PromptLayer
Observability & Evals · Free + paid
Prompt versioning and management platform
At a glance
- Made by
- PromptLayer
- Korean
- None (English and a few others only)
- API
- Yes
- Available on
- Web, API
What is PromptLayer?
PromptLayer is a collaboration layer for AI engineering teams, providing a prompt CMS, evaluation tools, and an observability stack. Prompts can be visually edited, versioned, tested, and deployed from a dashboard without a code deployment, so non-developer domain experts can take part. It links production traces to prompt versions to show cost, latency, and token usage, and evaluates changes before release with dataset-based tests, human review, and automated scoring. It also supports tool call tracing and multi-step execution evaluation for agent workflows.
- No-code prompt editor and prompt registry (versioning, comparison, rollback)
- Prompt A/B testing and gradual rollout
- Backtesting on historical data, regression testing, and model comparison evaluation
- Observability of cost, latency, and token usage
- Agent workflow versioning and tool call tracing
- REST API, SDK, webhooks, and OpenTelemetry
- SOC 2 Type 2, HIPAA, and GDPR compliant
Who uses PromptLayer and for what
- A non-developer content team improves a language-learning app's prompts on their own
- Prompt improvement and regression evaluation for an e-commerce customer support AI
- Agent that drafts outbound sales emails
Pricing
What you get for free — Available (Free $0: 5 users, 2.5k requests/month, 1 workspace, 250 evaluation cell runs/month, 10MB dataset)
| Plan | Price | Main limits |
|---|---|---|
| Free | $0/mo | 5 users, 2.5k requests per month, 1 workspace, 250 evaluation cell runs per month, 10MB dataset |
| Pro | $49/mo | Free limits plus unlimited playgrounds and workspaces, 150MB dataset, $0.003 per request over the limit |
| Team | $500/mo | 25 users, 100k+ requests per month, 7.5k+ evaluation cell runs per month, 1GB dataset, $0.002 per request over the limit |
| Enterprise | Contact sales | Custom pricing and limits, RBAC, deployment approvals, HIPAA with BAA, self-hosting option |
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying. · Official pricing page
AI tools similar to PromptLayer (alternatives)
PromptLayer vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| PromptLayer | Free + paid | 0 | 3 | Yes | $49/mo | No |
| Guidance | Free | 0 | 3 | — | — | — |
| Promptfoo | Free | 0 | 3 | Yes | — | No |
2 of these 3 tools have a free plan. Cheapest paid plan: PromptLayer ($49/mo).
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
PromptLayer on AI Galaxy Map
- One of 27 AI tools in the Observability & Evals field.
- Connected to 3 other tools — #20 in its field.
Frequently asked questions
Can I use PromptLayer for free?
Available (Free $0: 5 users, 2.5k requests/month, 1 workspace, 250 evaluation cell runs/month, 10MB dataset). Prices can change, so check the official site before paying.
What AI can I use instead of PromptLayer?
Tools that do the same job, such as Guidance, Promptfoo, PromptFlow, are connected to it on the map.
Can I use PromptLayer in Korean?
None (English and a few others only)
Sources (official pages)
- https://www.promptlayer.com/pricing/
- https://www.promptlayer.com/
- https://docs.promptlayer.com/overview
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.