Find blockchain development companies that build secure, scalable solutions for real business use. Choose from vetted experts in smart contracts, dApps, and enterprise blockchain integration.Â
Best Blockchain Development Agencies
3 Companies-Rankings updated: September 05, 2026
DesignRush assesses blockchain development firms for their technical expertise and verified client experiences to help you make better decisions. Some placements might be paid.
Embark on your digital transformation journey with AccelOne's Software Development delivery model, strategically designed for optimal outcomes. Initiate your digital transformation seamlessly through our comprehensive nearshore and US-based services...
Top Services:
Software Development
Mobile App Development
Blockchain
UI/UX Design
eCommerce Development
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Location
Seattle, Washington
Number of Employees
100 - 249
Minimal Budget
$25,000 - $50,000
Portfolios Count
5 Projects Listed
AccelOne Services
Software Development
Mobile App Development
Blockchain
UI/UX Design
eCommerce Development
Web Development
AI Development
Staff Augmentation
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
HSBC
Xapo
University of Washington
Pan American Energy SL
Cartoon Network
Data sourced from the agency's DesignRush profile
AccelOne Reviews & Testimonials
Gustavo Lemos
Review from Google
5.0★
Gustavo Lemos's Review Sourced from Google
I've been working in AccelOne for several years already and it's an amazing place to work. Great people and a good variety of clients.
Reviews verified by DesignRush and sourced from the agency's profile
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AI Development Company Enabling Innovation and Rapid Development
LeewayHertz is a leading AI development company with over 15 years of experience and a proven track record in delivering enterprise-grade solutions. The firm specializes in AI consulting, AI development, generative AI, and AI agent solutions that drive efficiency, improve decision-making and acceler...
Top Services:
Software Development
Blockchain
Mobile App Development
AI Development
IoT
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Location
Gurgaon, India
Number of Employees
250 - 499
Average Hourly Rate
$100/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
4 Projects Listed
LeewayHertz Services
Software Development
Blockchain
Mobile App Development
AI Development
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Siemens
Hershey
Pearson
McKinsey & Company
Procter & Gamble
Budweiser
3M
U.S. Army
Sultanate Of Oman
TRACERx
Data sourced from the agency's DesignRush profile
LeewayHertz Reviews & Testimonials
Manasvi A R
Review from Google
2.0★
Manasvi A R's Review Sourced from Google
Good morning,
I had attended the interview here for the role of Associate Software developer. As, a fresher I was happy with my performance.
After 2 days I got the rejection mail. Later when I asked the feedback I was told that my communication skills are good but I need to work on my technical skills.
May be not in my destiny.
Thank you
ANKUR SHARMA
Review from Google
5.0★
ANKUR SHARMA's Review Sourced from Google
Amazing interview experience. All the interviews are scheduled less than a 2 week.The best thing that I like is the HR itself calls me and for some reason I did not received call then she text me "please call me". Which is really good and amazing.
Jazz Jazz
Review from Google
5.0★
Jazz Jazz's Review Sourced from Google
Awesome Place to work. Ambience is so cool and peaceful.My friend is an employee there and she has only great things to say about the company. Any Company that keeps its employees happy and provides them with opportunities to learn and fulfill their career aspirations is surely on the right path to great heights.
Reviews verified by DesignRush and sourced from the agency's profile
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We are Tech Alchemy. We are passionate about start-ups...
Top Services:
Web Design
Web Development
Blockchain
AI Development
Mobile App Development
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Location
London, United Kingdom
Number of Employees
250 - 499
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
1 Project Listed
Tech Alchemy Services
Web Design
Web Development
Blockchain
AI Development
Mobile App Development
Business Consulting
Software Development
VR/AR
Product Design
Branding
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Ocean Bottle
EthoVentures
W3 Sports
Mercore Group Ltd
Darabase
Callahan's Mountain Lodge
Bando
My Bricks
Hyper SQ
MovieCoin
Data sourced from the agency's DesignRush profile
Tech Alchemy Reviews & Testimonials
Marcos Sargen
Review from Google
5.0★
Marcos Sargen's Review Sourced from Google
Tech Alchemy is building KTO’s centralized exchange and, so far, it’s been quite pleasant with the UI, visuals, and functionality. Can’t wait for the beta test to test what they’ve been working hard on for months!
Flora Castle
Review from Google
1.0★
Flora Castle's Review Sourced from Google
Based on the experience I had: poor communication and customer service. Don’t seem keen to take on a challenge and take a long time to respond. I was surprised by this after reading other good reviews for this company.
Martin Smith
Review from Google
5.0★
Martin Smith's Review Sourced from Google
Friendly and very knowledgeable team of developers. Very impressed with everything they've produced, can't recommend highly enough!
Reviews verified by DesignRush and sourced from the agency's profile
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Smart contract development and auditing: Writing self-executing code and reviewing it to prevent bugs, exploits, or costly failures Â
dApp development: Building decentralized apps that run on blockchain networks instead of centralized servers Â
Token development and NFT platforms: Creating digital tokens, cryptocurrencies, and marketplaces for trading assets Â
Blockchain integration: Connecting blockchain with existing systems like web apps, enterprise software, or cloud platforms Â
Private and enterprise blockchain solutions: Setting up custom networks for businesses that need control, privacy, and scalability Â
Blockchain consulting: Advising on use cases, architecture, and whether blockchain is the right fit Â
Wallet development: Building secure wallets for storing and managing digital assets Â
Maintenance and support: Monitoring performance, fixing issues, and updating systems after launchÂ
What platforms do blockchain developers use?
Blockchain development firms use a mix of public networks, enterprise platforms, and developer tools to build, deploy, and manage blockchain solutions. They choose platforms based on speed, cost, scalability, and whether the project needs a public or private network.Â
Key platforms and networks:Â
Ethereum: The most widely used platform for smart contracts and decentralized applications Â
Solana: Built for high speed and low fees, often used for scalable dApps and marketplaces Â
Avalanche: A flexible platform that supports custom blockchain networks and fast transaction finality Â
Hyperledger Fabric: Designed for private, permissioned systems used by enterprises Â
Corda (R3): Common in finance and regulated industries where data privacy is critical Â
IBM Blockchain: Enterprise-grade solution built on Hyperledger for secure business use cases Â
Development tools and infrastructure that blockchain development agencies use:Â
Node providers (e.g., Alchemy, Infura, QuickNode): Give developers access to blockchain networks without running their own nodes Â
Smart contract tools (e.g., Remix IDE): Used to write, test, and deploy contract code Â
Frameworks and CLIs (e.g., Ignite CLI): Help set up and manage blockchain projects fasterÂ
How much do blockchain companies charge for their services?
Simple solutions: 1 to 2 months Basic wallets or simple smart contract apps Â
Mid-level projects: 2 to 4 months dApps with integrations and user functionality Â
Complex systems: 4 to 9+ months DeFi platforms, marketplaces, or enterprise solutions Â
Blockchain development agencies build products in stages, and each is adding time:Â
Planning and requirements: 1 to 2 weeks Â
Architecture and design: 2 to 4 weeks Â
Development: 1 to 6 months Â
Testing and QA: 2 to 4 weeks Â
Deployment: 1 to 2 weeksÂ
Factors that affect the timeline include scope and feature set, choice of blockchain platform, team experience, and whether you build from scratch or use existing tools.
What is the difference between public and private blockchains?
Public blockchains are open to anyone, while private blockchains are restricted to approved users and controlled by an organization.Â
You can see the main differences in the following table:Â
Feature
Public blockchain
Private blockchain
Access
Anyone can join
Permission required
Control
Decentralized
Controlled by one entity or group
Transparency
Fully transparent
Limited visibility
Speed
Slower
Faster
Cost
Higher (transaction fees)
Lower
Security
High through decentralization
High, but depends on governance
Use cases
Crypto, DeFi, NFTs
Enterprise systems, internal operations
How do blockchain development agencies ensure security?
Blockchain development firms ensure security by combining secure coding, testing, and continuous monitoring to prevent vulnerabilities and protect data and transactions.Â
Key security practices include:Â
Smart contract audits: Reviewing code to detect bugs, exploits, and logic flaws before deployment Â
Secure development practices: Using proven frameworks, code standards, and peer reviews Â
Encryption and key management: Protecting data with cryptography and secure storage of private keys Â
Testing and simulation: Running stress tests and attack scenarios to identify weaknesses Â
Access control: Limiting permissions and enforcing authentication for users and systems Â
Ongoing monitoring: Tracking activity, detecting threats, and applying updates or patches quickly Â
Security is built into every stage, not added after deployment.Â