Langtail
Spreadsheet-like prompt testing and deployment studio with assertions and security guardrails for smaller teams.
| Category | Prompt Management |
| Open source | No |
| Self-hostable | No |
| Pricing model | freemium |
| Pricing notes | Free tier + paid plans |
| Framework integrations | openai-sdk, anthropic |
| Funding / ownership | Prague-based; pre-seed/seed |
Pricing/feature source: https://langtail.com/pricing
Frequently asked questions
Is Langtail open source?
No — Langtail is a proprietary/commercial product.
Can I self-host Langtail?
No — Langtail is cloud-only; there is no self-hosted deployment.
How much does Langtail cost?
Freemium. Free tier + paid plans