What is the difference between ReadMe and Tettra?

ReadMe is best for API-first companies that want a full developer hub with usage metrics, while Tettra is best for Teams wanting a simple internal knowledge base. ReadMe starts at $99/mo and Tettra starts at Free.

Is ReadMe or Tettra cheaper?

ReadMe starts at $99/mo with a free tier. Tettra starts at Free with a free tier.

Is there a free alternative to Tettra?

Both ReadMe and Tettra offer free tiers.

ReadMe vs Tettra

ReadMe is developer hub platform for creating interactive API documentation with built-in metrics and user management, while Tettra is simple internal knowledge base with AI-powered answers and Slack integration. The biggest difference up front: Tettra is free, while ReadMe starts at $99/mo. ReadMe is built for api-first companies that want a full developer hub with usage metrics, whereas Tettra targets teams wanting a simple internal knowledge base.

At a glance

	ReadMe	Tettra
Best for	API-first companies that want a full developer hub with usage metrics	Teams wanting a simple internal knowledge base
Starting price	$99/mo	Free
Free tier	✓	✓
Open source	—	—
Free tier available	✓	✓
Open source	—	—
AI Answers	—	✓
API Explorer	✓	—
Custom Branding	✓	—
OpenAPI Import	✓	—
Slack Integration	—	✓
Templates	—	✓
Usage Metrics	✓	—
User Management	✓	—
Verification	—	✓

ReadMe

Strengths

Personalized docs showing users their own API keys
Built-in API explorer for testing endpoints live
Usage metrics showing which endpoints developers actually call
Auto-generates docs from OpenAPI specifications

Weaknesses

Pricing starts at $99/mo which is steep for small teams
Opinionated layout with limited design customization
Better suited for API docs than general documentation
Learning curve for advanced customization features

Try ReadMe → Full review

Tettra

Strengths

Includes AI Answers as a core feature, purpose-built for documentation workflows
Includes Slack Integration as a core feature, purpose-built for documentation workflows
Free for up to 5 users — generous enough for most small teams to get real work done
Established product with 11+ years on the market and a mature ecosystem

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in documentation
Limited team/admin features if your organization eventually scales up

Try Tettra → Full review

The bottom line

Pricing: Tettra is completely free (Free for up to 5 users), which makes it the obvious pick if budget is the top concern. ReadMe starts at $99/mo, but Free for 1 project with basic features. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: ReadMe offers API Explorer, Custom Branding and OpenAPI Import that Tettra lacks. Tettra brings AI Answers, Slack Integration and Templates that ReadMe does not have.

Team fit: ReadMe is geared toward mid-size teams teams, while Tettra is aimed at small teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Where each tool shines: ReadMe's biggest strengths are: personalized docs showing users their own api keys. built-in api explorer for testing endpoints live. Tettra's biggest strengths are: includes ai answers as a core feature, purpose-built for documentation workflows. includes slack integration as a core feature, purpose-built for documentation workflows.

Watch out for: With ReadMe, users commonly note that pricing starts at $99/mo which is steep for small teams. With Tettra, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose ReadMe if...

You need a tool built for api-first companies that want a full developer hub with usage metrics
You specifically need API Explorer and Custom Branding
You care about built-in api explorer for testing endpoints live
Your team size fits the mid-size teams profile ReadMe is designed for
The free tier works for you: free for 1 project with basic features

Choose Tettra if...

Your profile matches its sweet spot: teams wanting a simple internal knowledge base
Budget is a hard constraint — Tettra is free, ReadMe is not
You specifically need AI Answers and Slack Integration
You care about includes slack integration as a core feature, purpose-built for documentation workflows
Your team size fits the small teams profile Tettra is designed for