PromptLayer
7.0#4 in prompting toolFrom $49 a monthFree planWebAPISelf-hosted
VisitPromptLayer vs SpacePrompts
SpacePrompts
7.4#3 in prompting toolFrom $5 a monthFree planWebAPIExtension
VisitWhat both publish
| Fact | PromptLayer | SpacePrompts |
|---|---|---|
| Evaluation | Evaluations can be triggered on new prompt versions, through the API, or ad hoc in the UI, and include historical backtests and side-by-side model comparisons. | The Evaluator scores prompts, identifies weak areas, and offers guidance to improve them. |
| Integrations | The LangChain integration exports traces through OpenTelemetry and supports cost and latency analytics, searchable metadata, and turning traces into evaluation datasets. | The privacy policy lists Google, GitHub, and Microsoft as OAuth providers for account authentication. |
| Intended users | PromptLayer describes its platform as serving engineers and domain experts who build and improve AI products together. | The maker describes SpacePrompts as serving people and teams who work with AI, including designers, writers, marketers, and API automation users. |
| Product | PromptLayer combines a prompt registry and visual prompt CMS with LLM evaluations, observability, and agent tracing. | SpacePrompts is a prompt management platform for saving, organizing, running, versioning, and reusing AI prompts. |
| Support | The pricing comparison lists basic support for Free, Pro, and Team, and dedicated support for Enterprise. | The site directs users to a contact form and says replies typically arrive within 24 hours. |
PromptLayer plans
- FreeFree
- Pro$49 a month
- Team$500 a month
- EnterprisePriced on request
SpacePrompts plans
- FreeFree
- Pro$5 a month
- Team$9 a month
Pick PromptLayer if…
PromptLayer suits engineers and domain experts who need to manage prompts and evaluate AI products together. Its enterprise hosting and access-control options may suit teams with specific deployment or governance needs.
Pick SpacePrompts if…
It suits people and teams who work with AI prompts, including designers, writers, marketers, and API automation users. Teams needing shared libraries and role-based permissions can consider the Team plan.