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
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.
App Development and Managed Cloud Services
At Custom D, we specialize in developing advanced and bespoke software solutions. We take pride in our work and the transformative impact that custom software can bring to businesses. Our team of highly skilled and experienced developers are passionate about providing exceptional service to our clients, and...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- Cloud Consulting
- Business Consulting
- Show more
- Location
- Christchurch, New Zealand
- Number of Employees
- Under 49
- Average Hourly Rate
- $199/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 7 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsCustom D Services
Data sourced from the agency's DesignRush profilePublic Interest Advocacy Centre Art Money Podium IMEX Pacific Money Transfer Australian Fellowship of Evangelical Students Inspire Foundation Sameview VSE International Student Volunteer Army Foundation of Arable Research
Custom D Reviews & Testimonials
James Kirkpatrick's Review Sourced from Google
Custom D have been fantastic in building our new website; they're fast, efficient and have been extremely helpful in addressing our concerns and answering questions. We have had a great experience using them and expect to have a good long working relationship going forward.
Tania Hill's Review Sourced from Google
As part of the voluntary administration group for the Inspire Foundation, I have worked closely with Julie and the Custom D team in the setting up of the Foundation's online application process. The team have been amazing to work with, finding solutions for the step by step processes as we worked our way through the implementation of the online system. Starting from scratch, their ability to grasp our needs quickly and clearly most certainly went a huge way towards creating a seamless process from what was a daunting prospect in the beginning. The open communication lines and prompt results greatly impressed me and I whole heartedly recommend Custom D as THE company to go to for all of your software, website and database design requirements.
Inspire Foundation's Review Sourced from Google
Custom D, are world class software and database designers. they built a website with intranet and an online application system for our Foundation which allows the processing of hundreds of applications for grants whch can be viewed and assessed in real time by our selction panel. The system was designed from scratch, modified and developed during the development process and then enhanced with user experience feedback.it worked first time, it is user friendly. Custom D had staff changes and never dropped the ball in delivering a brilliant piece of software for us that all our team use and appreciate.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAccelone Advancing What's Possible
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
- Show more
- Location
- Seattle, Washington
- Number of Employees
- 100 - 249
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 5 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAccelOne Services
Data sourced from the agency's DesignRush profileHSBC Xapo University of Washington Pan American Energy SL Cartoon Network
AccelOne Reviews & Testimonials
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 View All Reviews
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7 Frequently Asked Questions About Blockchain Development Companies
What services do blockchain development agencies offer?
Blockchain development agencies design, build, and support blockchain-based solutions that automate processes, improve transparency, and enable secure digital transactions.Â
Common services include:Â
- 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?
Blockchain development companies typically charge from $40,000 to $300,000+ for a full solution, depending on complexity, features, and security requirements.Â
Cost by project complexityÂ
The biggest cost driver is the solution's complexity, from basic smart contracts to full-scale platforms.Â
- Simple blockchain apps: $40,000 to $60,000Â
Basic features like simple smart contracts or payment functionality  - Mid-level applications: $60,000 to $150,000Â
dApps with user roles, integrations, and moderate decentralization  - Complex blockchain systems: $150,000 to $300,000+
Enterprise platforms, advanced security, custom architectureÂ
Cost by solution typeÂ
Different blockchain products have different price ranges based on functionality.Â
- dApps: $35,000 to $150,000Â Â
- NFT marketplaces: $55,000 to $125,000Â Â
- Crypto wallets: $125,000 to $200,000Â Â
- Crypto exchanges: $135,000 to $190,000Â Â
- DAO platforms: $10,000 to $30,000Â
Cost breakdown across the projectÂ
Your budget is split across multiple phases, not just development.Â
- Consulting and planning: 5%Â Â
- UI/UX design: 10%Â Â
- Core development: 45%Â Â
- Testing and QA: 25%Â Â
- Deployment and maintenance setup: 15%Â
Final pricing depends on scope, security level, integrations, and whether you build on an existing blockchain or create a custom one.Â
What are the ongoing costs of maintaining a blockchain solution?
Ongoing blockchain costs typically range from 15% to 25% of the initial development cost per year, depending on system complexity and usage. Â
Key ongoing costs include:Â
- Maintenance and updates: Bug fixes, performance improvements, and feature upgrades Â
- Infrastructure: Node providers, cloud services, and storage as usage grows Â
- Security: Regular audits, monitoring, and protection against vulnerabilities Â
- Transaction fees: Ongoing network or gas fees for processing transactions Â
- Support and operations: Technical monitoring, DevOps, and user support Â
- Compliance: Legal, regulatory, and data protection requirements Â
Costs increase as the system scales, handles more transactions, or requires higher security.Â
How long does it take to build a blockchain solution?
The best blockchain development company typically needs 3 to 9+ months to build a blockchain solution, depending on complexity, features, and security requirements.Â
Typical timeline by complexity:Â
- Simple solutions: 1 to 2 monthsÂ
Basic wallets or simple smart contract apps  - Mid-level projects: 2 to 4 monthsÂ
dApps with integrations and user functionality  - Complex systems: 4 to 9+ monthsÂ
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
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