What is the difference between tldraw and Eraser?

tldraw is best for Developers wanting an embeddable whiteboard canvas, while Eraser is best for Engineering teams creating architecture diagrams and technical documentation. tldraw starts at Free and Eraser starts at Free.

Is tldraw or Eraser cheaper?

tldraw starts at Free and is free. Eraser starts at Free and is free.

Is there a free alternative to Eraser?

Both tldraw and Eraser offer free tiers.

tldraw vs Eraser

tldraw is open-source collaborative whiteboard with a friendly interface and embeddable SDK, while Eraser is technical diagramming tool for software architecture, system design, and engineering docs. tldraw is open source and can be self-hosted, giving you full control over your data. tldraw is built for developers wanting an embeddable whiteboard canvas, whereas Eraser targets engineering teams creating architecture diagrams and technical documentation.

At a glance

	tldraw	Eraser
Best for	Developers wanting an embeddable whiteboard canvas	Engineering teams creating architecture diagrams and technical documentation
Starting price	Free	Free
Free tier	✓	✓
Open source	✓	—
Free tier available	✓	✓
Open source	✓	—
AI generation	—	✓
Architecture diagrams	—	✓
Diagram-as-code	—	✓
Embeddable	✓	—
Multiplayer	✓	—
Open Source	✓	—
SDK	✓	—
Technical docs	—	✓

tldraw

Strengths

Open source and transparent
Open-source codebase gives you full transparency and community-driven development
Fully open-source — you can self-host, audit the code, and avoid vendor lock-in
The core product is free with no paywalled essentials

Weaknesses

May lack some advanced features
Self-hosting is free but requires server maintenance and DevOps knowledge
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 diagramming

Try tldraw → Full review

Eraser

Strengths

Purpose-built for technical and architecture diagrams
Diagram-as-code generates visuals from text descriptions
Combines diagrams with technical documentation
AI-powered diagram generation from natural language

Weaknesses

Narrow focus — not for general brainstorming or design
Smaller community than Excalidraw or Miro
Some features still in development
Limited template library compared to Lucidchart

Try Eraser → Full review

The bottom line

Pricing: Both tldraw and Eraser are free, so this decision comes down to features and philosophy rather than budget.

Feature gaps: tldraw offers Embeddable, Multiplayer and Open Source that Eraser lacks. Eraser brings AI generation, Architecture diagrams and Diagram-as-code that tldraw does not have.

Open source: tldraw is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. Eraser is proprietary — you are trusting the vendor with your data and uptime.

Where each tool shines: tldraw's biggest strengths are: open source and transparent. open-source codebase gives you full transparency and community-driven development. Eraser's biggest strengths are: purpose-built for technical and architecture diagrams. diagram-as-code generates visuals from text descriptions.

Watch out for: With tldraw, users commonly note that may lack some advanced features. With Eraser, the main complaint is that narrow focus — not for general brainstorming or design.

Choose tldraw if...

Your profile matches its sweet spot: developers wanting an embeddable whiteboard canvas
You need self-hosting, data sovereignty, or the ability to audit source code
You specifically need Embeddable and Multiplayer
You care about open-source codebase gives you full transparency and community-driven development

Choose Eraser if...

You need a tool built for engineering teams creating architecture diagrams and technical documentation
You specifically need AI generation and Architecture diagrams
You care about diagram-as-code generates visuals from text descriptions