PromptVersions vs SpacePrompts
PromptVersions
promptversions.comSpacePrompts
spaceprompts.comSide by side
| Figure | PromptVersions | SpacePrompts |
|---|---|---|
| Price from | Free | $5/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 3 | 3 |
| Spec score · AI Prompt Management Software | 7.1 (#23) | 8.5 (#8) |
| Spec score · Prompt Management Software | 7.1 (#24) | 8.5 (#8) |
| Intended users | The maker describes the product as built for prompt engineers and says it supports product managers, writers, and analysts who edit prompts. | The maker describes SpacePrompts as serving people and teams who work with AI, including designers, writers, marketers, and API automation users. |
Plans
In their own words
PromptVersions
PromptVersions has no write-up on Specifiction yet; its figures are above.
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.