Modular Prompt Library vs PromptDocker
Modular Prompt Library
modularprompt.comPromptDocker
promptdocker.comSide by side
| Figure | Modular Prompt Library | PromptDocker |
|---|---|---|
| Price from | $2.50/mo | $29/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 5 | 4 |
| Spec score · Prompt Management Software | 8.2 (#10) | 8.8 (#6) |
| Intended users | The site identifies AI content creation teams, prompt engineers, marketing agencies, software development teams, customer support teams, and educational institutions as audiences. | The founding-members page lists startup teams, solo builders, consultants, prompt engineers, and low-code users among its intended users. |
| Product | Modular Prompt Library is an AI prompt management platform for building, managing, sharing, testing, and comparing prompts. | PromptDocker is a shared workspace for teams to write, test, version, and manage prompts. |
| Support | The site provides a support contact form for questions and help with the product. | Support is community for Free, priority for Pro, and dedicated for Enterprise. |
| Version history | The product tracks prompt changes with version history and supports reverting to previous versions. | The product tracks prompt changes and lets users revert versions without Git. |
Plans
Modular Prompt Library
- Personal AccountFree
- StarterFree
- Growth$2.50 a month
- Professional$5 a month
- EnterprisePriced on request
PromptDocker
- FreeFree
- Pro$29 a month
- EnterprisePriced on request
- Founding MemberPrice not published
In their own words
Modular Prompt Library
Modular Prompt Library is a web platform for building, managing, sharing, testing, and comparing AI prompts. Users can assemble prompts from reusable components and use them across projects. Version history records changes and supports returning to an earlier version, while shared libraries let teams review and collaborate on prompt work. For testing, users connect their own OpenAI, Anthropic, or Google API keys, fill prompt variables, adjust temperature, top-p, and max tokens, and save presets for a prompt version. The comparison environment displays outputs side by side with latency, token counts, and estimated cost. The site says keys are encrypted at rest, usage is billed directly by the model provider, and prompts, variables, and outputs remain in the user's workspace. Personal Account is free for personal use, with up to five workspaces and unlimited prompts and modules. Starter is free for up to five users or three workspaces; Growth costs $2.50 a month and Professional costs $5 a month. Organizational accounts have a 60-day free trial, and no credit card is required to start.
PromptDocker
PromptDocker has no write-up on Specifiction yet; its figures are above.