Endprompt vs SpacePrompts
Endprompt
endprompt.aiSpacePrompts
spaceprompts.comSide by side
| Figure | Endprompt | SpacePrompts |
|---|---|---|
| Price from | $99/mo | $5/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 3 | 3 |
| Spec score · Prompt Management Software | 8.2 (#9) | 8.5 (#8) |
| API | The developer page documents a simple HTTP API and examples in cURL, JavaScript, Python, PHP, and C#. | The API can retrieve and run prompts, count tokens, and enhance prompts; access is available on Pro and Team plans and limited to 60 requests per minute per API key. |
| Integrations | The site lists Next.js, Vercel AI SDK, LangChain, and OpenAI as integrations. | The privacy policy lists Google, GitHub, and Microsoft as OAuth providers for account authentication. |
| Product | Endprompt provides versioned, tested, and observable LLM endpoints with typed input and output schemas. | SpacePrompts is a prompt management platform for saving, organizing, running, versioning, and reusing AI prompts. |
Plans
In their own words
SpacePrompts
SpacePrompts is a prompt management platform for people and teams working with AI. It runs on the web, through an API, and with Chrome, Edge, and Firefox extensions. Users can save, organize, run, version, and reuse prompts. The Playground combines an editor, variables, model selection, and immediate runs. An Evaluator scores prompts, highlights weak areas, and gives improvement guidance. Every save creates a version that can be restored later. The prompt manager extension can turn highlighted webpage text into a prompt. Its token counter supports OpenAI, Claude, Gemini, and DeepSeek models, showing token counts and estimated costs. Pro and Team plans provide API access, limited to 60 requests per minute per key. Team workspaces add shared libraries, collaborative editing, and role permissions for up to five members. Free includes 50 prompts and daily usage limits; Pro is $5 a month billed annually, and Team is $9 a month billed annually.