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Top Blockchain Companies & Developers in Seattle

Ratings Updated: September 18, 2026

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21 Companies

Country: United States

State: Washington

City: Seattle

List of the Top Seattle Blockchain Development Companies

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RedDuck

5.0 13 reviews

$5,000+

$50 - $99 / hr

10 - 49

Serves Seattle, WA

Services provided

100% Blockchain

RedDuck is a Blockchain Development company specializing in comprehensive blockchain solutions, including smart contract and decentralized application development. With a 100% positive feedback rate, clients consistently praise their project management, technical expertise, and proactive communication. Approximately 80% of reviews highlight their ability to deliver scalable, secure, and user-friendly crypto solutions efficiently and within budget.

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Reviews mention Proactive
Clients have consistently praised RedDuck for their proactive approach, noting their effective communication through daily stand-ups and timely deliveries. One client highlighted the team's commitment to quality, stating that senior members actively ensured the project's success without unnecessary delays. Overall, the sentiment regarding proactivity is highly positive, with clients expressing satisfaction with RedDuck's responsiveness and dedication throughout the project lifecycle.

Platform Development for Financial Services Company

5.0 Jul 31, 2023

RedDuck has been very productive in their time management and has always delivered on time. They have been very proactive in communication with daily stand-ups and managers holding the junior devs responsible for the delivery timeline promised. The senior guys Mark & Dmytro really show care about the quality of the work their team delivers and step in as and when required. What is also very refreshing to see that the team delivered without fuss and unnecessary delays.
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5 of 5 Blockchain reviews are 5 stars

2 new reviews for Blockchain in past 6 months

$50,000 – $199,999 avg. project cost

Blockchain PROJECT HIGHLIGHT

Blockchain Development for FinTech Company
5.0 — RedDuck developed a DeFi platform for a financial technology company. The team built the client's smart contracts, backend infrastructure, frontend app, user dashboard, landing website, and a Read more
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More responsive than most other service providers

RedDuck is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Germany (1) India (1) South Africa (1) Thailand (1) Ukraine (1) United States (1) England (1)

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Slashdev

5.0 18 reviews

$5,000+

$50 - $99 / hr

10 - 49

Seattle, WA

Services provided

10% Blockchain

20% Custom Software Development

20% Mobile App Development +4 services

20% Web Development

10% AI Development

10% E-Commerce Development

10% IT Staff Augmentation

Slashdev is a versatile software development company specializing in building and refactoring applications, integrating systems, and providing recruitment services for technical roles. Reviews indicate a high level of customer satisfaction, with over 90% of feedback being positive, emphasizing Slashdev's technical expertise, timely delivery, and strong project management. Notably, 70% of reviewers praised the company's flexibility and communication, highlighting their ability to effectively collaborate with clients to meet project needs.

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Reviews mention Hard working
Clients have consistently praised Slashdev for their hard-working team, particularly highlighting the commitment and diligence of the junior Flutter developer assigned to their project. One client noted that the developer was 'committed, talented and hard working,' which contributed to the timely delivery of items and effective responsiveness to project needs. Overall, the sentiment surrounding the company's work ethic is highly positive, reflecting a strong dedication to meeting client objectives.

Staff Augmentation for Mental & Emotional Wellbeing Startup

5.0 Mar 13, 2023

The junior Flutter developer we hired through them was committed, talented and hard working.
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Industry Experience

Slashdev has demonstrated expertise across various industries, including Education, Information Technology, Software, Healthcare, Business Services, Real Estate, and Retail. Clients consistently commend their ability to refactor complex codebases, develop mobile applications, and recruit specialized talent efficiently. The feedback is overwhelmingly positive, highlighting strengths in project management, communication, and adaptability. Their impact is particularly noted in improving operational efficiencies and enhancing user experiences, making them a strong candidate for companies seeking technical development and support in these sectors.
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Healthcare IT Services Business services Other Industry Retail Software Information technology Education

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Average Project Cost Breakdown

$10,000 to $49,000 (4) Less than $10,000 (3) $50,000 to $199,999 (1)

What Clients Have Said
Clients consistently highlight Slashdev's competitive pricing and excellent value for money. One client noted they selected Slashdev due to their 'good value for cost' and 'pricing fit our budget.' Another emphasized that they received 'the best value on the market' and appreciated the company's commitment to delivering high-quality results at a fraction of competitors' prices. Overall, feedback reflects strong satisfaction with the balance between cost and the quality of service provided.
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England (4) United States (3) Sweden (2) Armenia (1) Brazil (1) Canada (1) Greece (1)

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AccelOne

4.9 12 reviews

$10,000+

$50 - $99 / hr

50 - 249

Kirkland, WA

Services provided

10% Blockchain

15% AI Development

15% Generative AI +6 services

10% AI Consulting

10% Custom Software Development

10% IT Managed Services

10% IT Staff Augmentation

10% Mobile App Development

10% Web Development

AccelOne is a software development company specializing in web development, app development, and technical staffing solutions. The company is consistently praised for its technical expertise, responsive communication, and seamless integration with clients' teams. Positive feedback is overwhelmingly high, with over 90% of reviewers commending their professionalism and adaptability. AccelOne is recognized for delivering quality work on time, often enhancing customer satisfaction and project outcomes.

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Reviews mention High-quality work
Clients consistently praised AccelOne for delivering high-quality work across various projects. One client remarked that their output was comparable to major software development firms, highlighting their responsiveness and ability to meet deadlines. Another emphasized the exceptional quality of their QA testing, leading to an expansion of services. Additionally, a project manager noted the impressive execution and collaboration skills demonstrated by AccelOne, with high-quality results achieved within tight timelines. Overall, the sentiment regarding the quality of work is overwhelmingly positive.

Web Development for Cybersecurity Training Company

5.0 Oct 5, 2023

We were able to raise our bottom line while meeting the highest standards of quality and timelines. Timelines were met for various complex phases of the application. High standards of code quality and security were addressed for an outcome that increased internal stakeholder and customer satisfaction.
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Development for Personal Safety & Security App

5.0 Apr 4, 2019

Now, thanks to their hard work, we have a new version of both products that we’re happy to promote. AccelOne delivered high-quality work comparable to major software development companies that I’ve worked with in the past. Every team member was highly responsive; even the CTO got involved due to the complexity of the project.
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Staff Augmentation for Audio Products Manufacturer

5.0 Aug 6, 2018

They're excellent at coding, implementation, and strategy. It's the nature of software that there are bugs when the software is completed, but AccelOne has been able to get any issues resolved quickly. The quality of their work is very high.
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Biometric Software Dev for IT Consulting Company

5.0 Jul 24, 2018

The quality of their work and their responsiveness was exceptional, and they were perceptive of the needs of the multiple stakeholders. They were very skilled in developing a plan and implementing it in a very collaborative environment. They had wonderful delivery and execution.
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Industry Experience

AccelOne has demonstrated expertise across various industries, including cybersecurity, gaming, fintech, media, and IT services. Client feedback highlights their strengths in project management, technical proficiency, and seamless integration with existing teams. They have positively impacted projects through effective communication and high-quality deliverables, leading to increased efficiency and satisfaction. Overall sentiment indicates a strong fit for clients seeking support in software development and engineering across diverse sectors.
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Software Wellness & Fitness Information technology Consumer Products Business services Publishing Media IT Services

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More responsive than most other service providers

AccelOne is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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United States (10) Argentina (2)

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Virtuosity Consulting

5.0 1 review

$10,000+

$25 - $49 / hr

50 - 249

Bellevue, WA

Services provided

10% Blockchain

25% Custom Software Development

20% IT Managed Services +4 services

15% CRM Consulting and SI

10% BI & Big Data Consulting & SI

10% Enterprise App Modernization

10% Web Development

Virtuosity Consulting is a consultancy firm specializing in providing program managers and developers to streamline release processes for enterprises. The company receives overwhelmingly positive feedback, with clients highlighting their ownership of projects, flexibility, and seamless integration as an extension of the team. Nearly all reviewers emphasize their excellent service quality and adaptability to changing demands.

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Industry Experience

Virtuosity Consulting has received positive feedback primarily from the software industry, highlighting their expertise in managing complex release processes and providing skilled program managers. Clients commend their ability to adapt to project demands, enhance efficiency, and deliver quality outcomes. Their proactive approach to ownership and process improvement stands out, leading to successful collaborations. Overall, the sentiment is highly favorable, indicating strong suitability for software development projects, particularly those requiring meticulous process management and flexible resource allocation.
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Software

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Average Project Cost Breakdown

$200,000 to $999,999 (1)

What Clients Have Said
Clients have consistently praised Virtuosity Consulting for their cost-effectiveness and high value for money. One client highlighted their decision to enter a multi-year contract based on favorable pricing and the quality of candidates provided. Additionally, the agency demonstrated flexibility in budget adjustments, successfully adapting to changing project demands while maintaining quality and efficiency, which further solidified their reputation as a valuable partner.
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Niftmint

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Services provided

70% Blockchain

30% Custom Software Development

In Seattle, Washington, Niftmint is a small Blockchain company. Their services include Blockchain and Custom Software Development.
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New Alchemy

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Services provided

80% Blockchain

20% Business Consulting

New Alchemy is a Blockchain company launched in 2016. The agency focuses on Blockchain and Business Consulting.
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Mirai Blockchain Group

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Services provided

100% Blockchain

Mirai Blockchain Group, a Blockchain company, was launched in 2021. In Seattle, Washington, the team specializes in Blockchain.
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Look Lateral Inc.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Services provided

50% Blockchain

50% AI Development

Look Lateral Inc., a small AI company and Blockchain company, is located in Milano, Italy and Seattle, Washington. The team specializes in Artificial Intelligence and Blockchain.
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Seattle, WA

1200 Westlake Ave. N. Ste 802
Seattle, WA 98109
2 - 5

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Futurism Technologies, Inc.

4.5 1 review

$10,000+

$25 - $49 / hr

250 - 999

Bellevue, WA

Services provided

10% Blockchain

10% AI Development

10% Custom Software Development +7 services

10% Cybersecurity

10% Digital Engineering

10% IT Managed Services

10% IT Strategy Consulting

10% IoT Development

10% Robotics Process Automation

10% UX/UI Design

Futurism Technologies offers digital marketing enhancements, eCommerce optimization, and IoT cybersecurity services. Client reviews highlight their effective solutions in increasing website traffic and sales, combined with robust security measures. Futurism Technologies is noted for their expertise, proactive communication, and timely project management, ensuring smooth and productive collaborations.

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Bellevue, WA

1400 112th Avenue Southeast
Bellevue, WA 98004
201 - 250

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Omni212

Not yet reviewed

$1,000+

$100 - $149 / hr

10 - 49

Bellevue, WA

Services provided

10% Blockchain

25% AI Development

20% Cloud Consulting & SI +3 services

20% Cybersecurity

15% BI & Big Data Consulting & SI

10% CRM Consulting and SI

Omni212 is an AI firm. The Bellevue, Washington-based team focuses on Artificial Intelligence and cloud consulting & SI.
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TF Labs

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Services provided

20% Blockchain

20% AR/VR Development

20% Branding +2 services

20% Content Marketing

20% Generative AI

Branding firm TF Labs was established in 2017. The team specializes in Branding and Content Marketing and is headquartered in Seattle, Washington.
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Vinova

4.6 5 reviews

$1,000+

< $25 / hr

50 - 249

Seattle, WA

Services provided

10% Blockchain

15% Low/No Code Development

10% Custom Software Development +30 services

10% IT Staff Augmentation

10% Mobile App Development

10% Web Development

5% AI Development

5% IT Managed Services

1% AI Consulting

1% API Development

1% AR/VR Development

1% Application Management & Support

1% Application Testing

1% CRM Consulting and SI

1% Cloud Consulting & SI

1% Cybersecurity

1% DevOps Managed Services

1% Digital Strategy

1% E-Commerce Development

1% ECM Consulting and SI

1% ERP Consulting and SI

1% Email Marketing

1% Employer of Record (EOR) Services

1% Enterprise App Modernization

1% Generative AI

1% HR Outsourcing

1% IT Strategy Consulting

1% IoT Development

1% Microservices Architecture Services

1% Mobile & App Marketing

1% Robotics Process Automation

1% Wearable App Development

1% Web Design

Vinova is a versatile development company specializing in mobile and web applications, IT support, and strategic market research. Across five reviews, 80% highlight their professionalism and timely delivery, while 60% commend their proactive communication and client understanding. However, 20% suggest a need for clearer scope definition. Overall, Vinova is praised for its flexibility, engagement, and capability to meet diverse client needs efficiently.

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Industry Experience

Vinova has demonstrated expertise across diverse industries, including Financial Services, Education, Business Services, and Information Technology. Clients commend their strong project management, responsiveness, and ability to understand client needs, leading to significant operational improvements. In Financial Services, they excelled in app development, while in Education, they provided reliable IT support. Their work in Business Services focused on system upgrades, enhancing productivity, and in Information Technology, they supported strategic market entry initiatives. Overall, Vinova is well-suited for clients seeking tailored technology solutions across these sectors.
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Business services IT Services Information technology Education Financial services

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More responsive than most other service providers

Vinova is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Singapore (4) United States (1)

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Seattle, WA

4751 12th Avenue Northeast
Seattle, WA 98105
16 - 20

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Devscale

5.0 9 reviews

$25,000+

$100 - $149 / hr

10 - 49

Puyallup, WA

Services provided

10% Blockchain

30% Mobile App Development

15% AI Development +3 services

15% Custom Software Development

15% UX/UI Design

15% Web Development

Devscale is a software development firm specializing in building and enhancing products, websites, and applications for a diverse range of industries. The reviews highlight their strong project management, consistent communication, and timely delivery, with 100% of the reviewers expressing satisfaction with their services. Numerous clients commend Devscale's creativity, leadership, and collaborative approach, while a few suggest improvements in communication on timelines. The company is praised for its personable and engaging team, fostering a fun yet professional working relationship.

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Industry Experience

Devscale demonstrates strong expertise across multiple industries, including Education, Advertising & Marketing, Legal, and Healthcare. Clients commend their attention to detail, effective project management, and ability to deliver high-quality, user-centric designs. The overall sentiment is highly positive, highlighting strengths in communication and reliability, especially in complex projects. They are particularly suited for companies seeking innovative solutions in SaaS, website development, and client portal systems.
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Education Advertising & marketing Other industries Legal Retail

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Average Project Cost Breakdown

$10,000 to $49,000 (3) $200,000 to $999,999 (3) $50,000 to $199,999 (2)

What Clients Have Said
Clients consistently commend Devscale for their cost-effectiveness and value for money. Feedback highlights strong project management, timely delivery, and transparent communication, with one client noting, "The real cost of a vendor isn’t what you pay for them, but the combination of price, time, and quality." Another client appreciated their flexibility, stating, "They’ve always been super flexible on payment." Overall, sentiments reflect satisfaction with the balance of pricing and quality delivered.
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Chicago, Illinois (5) St. Louis, Missouri (1) New York City, New York (1) Green Bay, Wisconsin (1) Los Angeles, California (1)

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Puyallup, WA

3103 31st Avenue Southeast
Puyallup, WA 98374
1

847-260-7174

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Leszynski Group, Inc.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Bellevue, WA

Services provided

10% Blockchain

20% Business Consulting

20% Cloud Consulting & SI +5 services

10% AI Development

10% Custom Software Development

10% IoT Development

10% Mobile App Development

10% Web Development

Leszynski Group, Inc. Is a cloud consulting & SI company. Launched in 1990, the team specializes in cloud consulting & SI and Business Consulting.
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Marici Technology Solutions

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Services provided

10% Blockchain

10% API Development

10% Cloud Consulting & SI +7 services

10% Custom Software Development

10% DevOps Managed Services

10% E-Commerce Development

10% ECM Consulting and SI

10% ERP Consulting and SI

10% Enterprise App Modernization

10% IoT Development

Cloud consulting & SI company Marici Technology Solutions provides cloud consulting & SI and ECM consulting and SI. They are headquartered in Seattle, Washington.
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Dom Cat Digital

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Services provided

10% Blockchain

20% Blockchain Marketing

20% Pay Per Click +4 services

20% Search Engine Optimization

10% Content Marketing

10% Corporate Training & Coaching

10% Social Media Marketing

Established in 2022, Dom Cat Digital is a small SEO services firm. Their team specializes in Search Engine Optimization and Pay Per Click.
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v37

Not yet reviewed

$5,000+

$100 - $149 / hr

2 - 9

Seattle, WA

Services provided

10% Blockchain

20% Custom Software Development

20% Enterprise App Modernization +3 services

20% Web Development

15% E-Commerce Development

15% Mobile App Development

V37 is a custom software development company located in Seattle, Washington. Launched in 2022, the team specializes in Custom Software Development and Web Development.
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Karma Consulting, Inc.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Federal Way, WA

Services provided

10% Blockchain

10% AI Consulting

10% AR/VR Development +7 services

10% CRM Consulting and SI

10% Cloud Consulting & SI

10% Custom Software Development

10% ERP Consulting and SI

10% IT Managed Services

10% IT Staff Augmentation

10% UX/UI Design

Karma Consulting, Inc. Is an UX design agency. They are in Federal Way, Washington. Their team provides UX/UI Design and cloud consulting & SI.
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Transparent Path

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Services provided

100% Blockchain

Founded in 2018, Transparent Path is a Blockchain company. The company focuses on Blockchain, and is small.
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Core Scientific

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Bellevue, WA

Services provided

50% Blockchain

50% AI Development

Core Scientific, an artificial intelligence development company and Blockchain company, offer Artificial Intelligence and Blockchain. They were established in 2017.
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Atonomi

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Services provided

50% Blockchain

50% IoT Development

Atonomi is a Blockchain and IoT development company. They are in Seattle, Washington and have small team. Their services include Blockchain and IoT development.
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Abasys Technologies Inc

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Bellevue, WA

Services provided

20% Blockchain

20% Custom Software Development

20% E-Commerce Development +2 services

20% Mobile App Development

20% Web Development

Abasys Technologies Inc is a software development firm. Located in Bellevue, Washington, the firm was founded in 1987. Their services include Custom Software Development and Blockchain.
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Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 Slashdev

2 AccelOne

3 Virtuosity Consulting

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 3 Seattle Blockchain Development Companies

Slashdev

$5,000+

$50 - $99 / hr

10 - 49

Seattle, WA

Ability to deliver

30.6/40.0

16.6/20 Reviews

10/10 Clients & Experience

4/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
AccelOne

$10,000+

$50 - $99 / hr

50 - 249

Kirkland, WA

Ability to deliver

29.7/40.0

16/20 Reviews

8.6/10 Clients & Experience

5/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Virtuosity Consulting

$10,000+

$25 - $49 / hr

50 - 249

Bellevue, WA

Ability to deliver

24.6/40.0

16.2/20 Reviews

3.1/10 Clients & Experience

5.3/10 Market Presence

Service focus

10% Blockchain

90% Other

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Niftmint

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

70% Blockchain

30% Other

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New Alchemy

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

80% Blockchain

20% Other

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Mirai Blockchain Group

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

100% Blockchain

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Look Lateral Inc.

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Blockchain

50% Other

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Futurism Technologies, Inc.

$10,000+

$25 - $49 / hr

250 - 999

Bellevue, WA

Ability to deliver

4.2/40.0

0/20 Reviews

0/10 Clients & Experience

4.2/10 Market Presence

Service focus

10% Blockchain

90% Other

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Omni212

$1,000+

$100 - $149 / hr

10 - 49

Bellevue, WA

Ability to deliver

4.1/40.0

0/20 Reviews

0/10 Clients & Experience

4.1/10 Market Presence

Service focus

10% Blockchain

90% Other

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TF Labs

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

20% Blockchain

80% Other

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Vinova

$1,000+

< $25 / hr

50 - 249

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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Devscale

$25,000+

$100 - $149 / hr

10 - 49

Puyallup, WA

Ability to deliver

30.8/40.0

16.2/20 Reviews

9.8/10 Clients & Experience

4.8/10 Market Presence

Service focus

10% Blockchain

90% Other

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Leszynski Group, Inc.

Undisclosed

Undisclosed

10 - 49

Bellevue, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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Marici Technology Solutions

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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Dom Cat Digital

Undisclosed

Undisclosed

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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v37

$5,000+

$100 - $149 / hr

2 - 9

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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Karma Consulting, Inc.

Undisclosed

Undisclosed

10 - 49

Federal Way, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Blockchain

90% Other

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Transparent Path

Undisclosed

Undisclosed

10 - 49

Seattle, WA

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

100% Blockchain

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