| Eraser | Fern | GitBook | |
|---|---|---|---|
| Pricing | |||
| Free Tier |
Yes
Files: 3, Ai Diagrams: 5
|
Yes
Team Members: 2, Ai Credits: 250
|
Yes
Users: 1
|
| Tiers |
Free
Free
|
Hobby
Free
|
Free
Free
|
|
Starter
$20/mo
+ $20/seat
-25% annual
|
Team
$200/mo
-25% annual
|
Premium
$65/mo
+ $12/seat
|
|
|
Business
$60/mo
+ $60/seat
-25% annual
|
Enterprise
Contact Sales
|
Ultimate
$249/mo
+ $12/seat
|
|
|
Enterprise
Contact Sales
|
— |
Enterprise
Contact Sales
|
|
| Portability | |||
| Switching Cost | moderate | moderate | moderate |
| Open Standard | Proprietary | OpenAPI | Markdown / Git |
| What You Lose | Diagram definitions, version history, custom icons, API integrations | Hosted docs portal, SDK generation pipeline, custom themes, Git Sync config | Custom domain config, branding, AI assistant setup, site insights, access controls |