Top 5 technical writing agencies for SaaS & devtools in 2026

In 2026 the state of documentation has shifted from just being a static manual that sits on a shelf to a functional interface that sits between your product and both human developers and AI agents.

Documentation now acts as a revenue driver, documentation is now treated as code (docs-as-code) going through the same CI/CD pipeline, to even LLM-ready docs, training data for your AI assistants. Because of this every SaaS or dev tool company have started investing heavily in documentation.

we are going to explore the top 5 technical writing agencies in 2026, that can transform your documentation for your sales, product, and engineering teams, providing clarity on what agency you should go for depending on your needs and how you want your success measured.

What to look for in a Technical Writing Agency in 2026.

Before we get on with the list, you must know what to expect and the type of service agencies typically deliver. Agencies are directly involved with how your customers interact with your documentation or content without hinderances.

Developer portals

Developer portals provides a central place for developers to find, use, and fix software services and infrastructure. Typically including API documentation, tech documentation, and automates common workflows.

With an agency providing this service, you should expect a fully functioning API and technical documentation for your developers to go and learn about the systems they work on and interact with.

Marketing and technical SEO content

Technical SEO content are search-driven content that answers developers questions, typically relating to your developer product or integration problems, reflecting what your users or potential users are currently searching about.

With an agency providing this service, you should expect higher visibility on search engines, and increased rankings on relevant keywords.

Knowledge bases or help centers

Knowledge bases is a digital library of information about a company’s product, services or industry-related topics. Built either for internal employees or external users being maintained as the product evolves.

With an agency providing this service, you should expect to see a substantial drop in support tickets, smoother onboarding, and faster issue resolutions.

Continuous content support

After your content has been deliver technical writing agencies typically offer ongoing maintenance, ensuring all deliverables are accurate and relevant as the product keeps changing and evolving. You should expect to see fewer complaints or errors due to outdated documentation, and little to no content gaps.

Now that you know what to expect with technical writing agencies, here are the top 5 best technical writing agencies in 2026.

Top 5 Technical writing agencies in 2026

1. WriteChoice

Founded: 2020

Best for: SaaS, APIs, and high-growth tech teams.

WriteChoice is a top technical writing agency that helps SaaS and API-first companies to increase product adoption, reduce in support tickets and maximising growth. Customers do not need to hire or manage multiple vendors.

Founded by Cassiano Moraes, WriteChoice was created to bridge the high-stakes gap between technical innovation and market adoption for tech companies especially Seed and Series A startups, a scaling bottleneck. WriteChoice solves the in-house expertise gap by replacing the slow, 4-month traditional hiring cycle with an elite, cross-functional squad of technical writers, developers, and UX designers. By deploying a professional, documentation-as-code portal in just 6 to 8 weeks.

Transforming documentation from a support cost-center into a growth engine. WriteChoice framework directly targets the three pillars of operational efficiency: slashing engineering support overhead, accelerating developer time-to-value (TTV), and ensuring that product adoption keeps pace with rapid feature deployment.

Services typically include:

• API documentation

• SaaS documentation

• Developer portals

• Technical manuals

• Knowledge bases

Here are some of the clients they’ve worked for:

• Yuno

• Harri

• Sun Synk

• Fireflies.ai

• Liblab (now acquired by Postman)

Prolific Work: WriteChoice was responsible for creating the entire Yuno API documentation, and Yuno went on to win the best API documentation award at the API awards for 2025.

WriteChoice helped us create our developer site from scratch in record time. They have a team of incredible people both personally and professionally and the most important thing about them is the start-up spirit of making things happen. I really consider them more than a supplier, a great business partner — Gabriel Lansky, Project Manager at Yuno.

2. DevDocs

Founded: 2020

Best for: Developer teams primarily seeking an agency to improve developer documentation, structuring and scaling technical content for complex products

DevDocs is a documentation agency focused on developer products, and software platforms. The team typically includes technical writers, designers, and project managers who work together to plan, write and maintain documentation.

DevDocs was responsible for re-building Qualcomm’s AI Engine Direct SDK documentation architecture. Their work improved how developers find and use Qualcomm’s SDK content decreasing time to locate information by 70 percent.

Here are some of the clients they’ve worked for:

• Qualcomm

• Dell

• littlepay

3. Hackmamba

Founded: 2021

Best for: Developer marketing, open-source advocacy, and technical content for developer tools.

Hackmamba is a specialised technical content agency that lives at the intersection of engineering and marketing. They focus heavily on building developer trust through high quality tutorials, technical guides, open-source contributions. Unlike major agencies that focus on internal manuals, Hackmamba excels at creating external-facing content that drives developer adoption and community engagement.

Hackmamba is widely recognised for their Contributor Model, which leverages a solid network of technical writers to produce high volumes of technical content that ranks for long-tail developer queries. Their work has successfully positioned several startups as thought leaders in the Developer Experience space

Here are some of the clients they’ve worked for:

• Flutterwave

• Appwrite

• Novu

4. 3DI Information

Founded: 2002

Best for: Clear documentation, translation and localisation for complex content ops

3DI Information Solutions is a technical communication and content agency that focuses heavily on technical writing, content ops, and translation or localisation. They’ve been established since 2002, with 23 years of experience in the field and over 300 customers. They’re also known for working with various industries, including telecommunications, software development, robotics amongst others.

3DI revamped Auth0’s (now Okta) documentation, improving the Hemingway readability score from a Grade 10 to a Grade 6, directly reducing support forum queries.

Here are some of the clients they’ve worked for:

• OtoData

• British Business Bank

• Apptio

5. TechDocs

Founded: 2021

Best for: High-end developer experience (DX), infrastructure-as-code (IaC), and API documentation for technical audiences.

TechDocs.studio is an engineering-led technical documentation agency that bridges the gap they specialise in heavy technical niches such as DevOps, Cloud infrastructure and Cybersecurity. They are widely recognised for their engineers-as-writers philosophy, ensuring that documentation is not only grammatically correct but technically accurate and runnable.

TechDocs.studio has a proven track record of reducing Time-to-First-API-Call for developer tools, transforming dense internal engineering notes into public-facing, high-conversion developer portals that function as a secondary sales engine.

Here are some of the clients they’ve worked for:

• Firefly

• Env0

• Incredibuild

Conclusion

Before choosing, it is imperative that you go with a technical writing agency that is willing to understand your product and users, and is clear about the outcomes, and how those outcomes will be measured. Choosing an Agency that prioritises outcomes, clear communication, consistent follow ups and continuous support

WriteChoice is built for SaaS teams that need a business partner not just another agency, for teams that need API-documentation and cutting-edge developer portals that are built to convert.

If you are working on SaaS, dev tools and AI products and want developer portals that converts, support growths, and increased product adoption, let’s discover your path together.

FAQs

1. Why is documentation considered a revenue driver in 2026?

In the modern SaaS landscape, documentation is no longer just a manual; it is a functional interface that bridges the gap between your product, human developers, and AI agents. By reducing Time-to-Value (TTV) and providing LLM-ready data for AI assistants, high-quality docs directly increase product adoption and reduce customer churn, transforming a traditional cost center into a growth engine.

2. How does a specialised technical writing agency reduce support costs?

By building comprehensive Knowledge Bases and Developer Portals, agencies address repetitive user queries before they become support tickets. For example, WriteChoice famously created Harri’s documentation that led to a 35% less support tickets.

3. What is the benefit of hiring an agency over hiring in-house writers?

For Seed and Series A startups, the traditional hiring cycle for an in-house technical writer can take up to 4 months. Specialised agencies like WriteChoice solve this expertise gap by providing a cross-functional squad (Technical Writers, Developers, and UX Designers) that can deploy a professional, fully functional developer portal in just 6 to 8 weeks.

4. When should a SaaS company hire a technical writing agency

A SaaS company should hire a technical writing agency when documentation becomes a bottleneck to scaling, typically signaled by high engineering support overhead, slow customer onboarding, or poor product adoption. Reaching Seed or Series A funding usually marks the shift where specialised expertise is needed to build a professional Developer Portal or Knowledge Base.

5. Which technical writing agency is best for my specific needs?

Choosing the right technical agency depends on your core objectives:

• WriteChoice: Best for high-growth SaaS and API-first startups needing rapid growth and product adoption.

• DevDocs: Best for complex products requiring deep structural improvements and SDK documentation.

• Hackmamba: Developer marketing, open-source advocacy, and technical content for developer tools.

• 3di Information: Best for large-scale enterprises requiring localisation and complex content operations.

• TechDocs.studio: Best for infrastructure-heavy niches like DevOps, Cybersecurity, and Cloud computing.