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.
Best Blockchain Development Agencies
2 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.
Building AI-Powered Software That Delivers Results
Plavno is an AI-first software development company that helps businesses accelerate innovation through intelligent automation, AI assistants, and scalable digital platforms. With more than two decades of experience and hundreds of successful projects delivered, the company specializes in building advanced...
Top Services:
Mobile App Development
Web Development
eCommerce Development
Blockchain
Software Development
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Location
Warsaw, Poland
Number of Employees
100 - 249
Average Hourly Rate
$25/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
25 Projects Listed
Plavno Services
Mobile App Development
Web Development
eCommerce Development
Blockchain
Software Development
IT Services
AI Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Mercedes
Xerox
Kia
Amazon
eBay
PayPal
IBM
MediaCube
Data sourced from the agency's DesignRush profile
Plavno Reviews & Testimonials
Alexander Nikolaevsky CEO at Whitebird
5.0★
Web Development Review from Alexander Nikolaevsky
We have hired the Plavno team to develop a cryptocurrency exchange solution.allow users to make cryptocurrency transactions legally and transparently. Plavno team had to create a solution independent of third-party developers, develop frontend solutions for clients and service administrators, build a full-featured back-end that would include integration with banking and payment systems, and a multifunction module for managing currency exchange transactions, exchange rates.
Mitya Smusin CEO at Yellow Systems
5.0★
Financial Review from Mitya Smusin
Some problems can only be solved with code, but others require end-user thinking. So Plavno developers remember that the whole goal is to solve problems — not only to write code. They thought about the problem from the restaurantants point of view.They developed a food delivery app with both customer and admim panels, which covers all the necessary functionality.
Yana Romanovskaya Product Manager at Beeline
5.0★
IT Outsourcing Review from Yana Romanovskaya
Plavno was creating profiles with pulling up a lot of information (clusters). Xunit-based scoring was used when setting up a .NET 2.0 project. Scoring for this format works similarly to Junit. The team extended the products by adding features, fixing bugs. This development can change cluster parameters, cluster management system (current state of the object), customize vectors that lead to this cluster and make predictions.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Ebryx LLC is a 360° cybersecurity and secure engineering company trusted by enterprises, startups, and governments to safeguard critical digital ecosystems. Since 2008, we have combined advanced threat research, 24/7 security operations, and deep product engineering expertise to deliver protection that is...
Top Services:
Cybersecurity
DevOps Consulting
Cloud Consulting
Staff Augmentation
Big Data Analytics
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Location
Salem, New Hampshire
Number of Employees
100 - 249
Average Hourly Rate
$37/hr
Minimal Budget
$25,000 - $50,000
Ebryx LLC Services
Cybersecurity
DevOps Consulting
Cloud Consulting
Staff Augmentation
Big Data Analytics
IT Compliance Solution
Mobile App Development
AI Development
Blockchain
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Smart contract development and auditing: Writing self-executing code and reviewing it to prevent bugs, exploits, or costly failures
dApp development: Building decentralized apps that run on blockchain networks instead of centralized servers
Token development and NFT platforms: Creating digital tokens, cryptocurrencies, and marketplaces for trading assets
Blockchain integration: Connecting blockchain with existing systems like web apps, enterprise software, or cloud platforms
Private and enterprise blockchain solutions: Setting up custom networks for businesses that need control, privacy, and scalability
Blockchain consulting: Advising on use cases, architecture, and whether blockchain is the right fit
Wallet development: Building secure wallets for storing and managing digital assets
Maintenance and support: Monitoring performance, fixing issues, and updating systems after launch
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.
Key platforms and networks:
Ethereum: The most widely used platform for smart contracts and decentralized applications
Solana: Built for high speed and low fees, often used for scalable dApps and marketplaces
Avalanche: A flexible platform that supports custom blockchain networks and fast transaction finality
Hyperledger Fabric: Designed for private, permissioned systems used by enterprises
Corda (R3): Common in finance and regulated industries where data privacy is critical
IBM Blockchain: Enterprise-grade solution built on Hyperledger for secure business use cases
Development tools and infrastructure that blockchain development agencies use:
Node providers (e.g., Alchemy, Infura, QuickNode): Give developers access to blockchain networks without running their own nodes
Smart contract tools (e.g., Remix IDE): Used to write, test, and deploy contract code
Frameworks and CLIs (e.g., Ignite CLI): Help set up and manage blockchain projects faster
How much do blockchain companies charge for their services?
Simple solutions: 1 to 2 months Basic wallets or simple smart contract apps
Mid-level projects: 2 to 4 months dApps with integrations and user functionality
Complex systems: 4 to 9+ months DeFi platforms, marketplaces, or enterprise solutions
Blockchain development agencies build products in stages, and each is adding time:
Planning and requirements: 1 to 2 weeks
Architecture and design: 2 to 4 weeks
Development: 1 to 6 months
Testing and QA: 2 to 4 weeks
Deployment: 1 to 2 weeks
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.
You can see the main differences in the following table:
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.
Key security practices include:
Smart contract audits: Reviewing code to detect bugs, exploits, and logic flaws before deployment
Secure development practices: Using proven frameworks, code standards, and peer reviews
Encryption and key management: Protecting data with cryptography and secure storage of private keys
Testing and simulation: Running stress tests and attack scenarios to identify weaknesses
Access control: Limiting permissions and enforcing authentication for users and systems
Ongoing monitoring: Tracking activity, detecting threats, and applying updates or patches quickly
Security is built into every stage, not added after deployment.