Public price
Found a public price ($29 / month) on the pricing page.
Open sourceLangfuse alternatives
Langfuse lists $29 / month. We found 8 out of 10 of the buying evidence we check for. 4 of the 22 other products below publish more.
This is a comparison of what each company publishes on its own site. It covers price, free access, measured results, documented limits, product updates, and testing methods. It is evidence for a shortlist, not a rating of product quality. The products below share a broad category and are not necessarily direct substitutes. Use Comparima for direct competitors.
LLM observability and evalsHow this market looks from public information.
5 of 23for published buying evidence
1 of 7comparable monthly prices are lower
78%can be tried first
30%publish measured results
65%state their limits
What we could verify
Every finding links to the page it came from. Open the source before relying on it.
Try before paying
A buyer can verify the claim themselves without paying ("Start free").
Open sourceMeasured customer result
A possible mention appeared on a comparison or unrelated page, so we did not count it.
Open sourceDocumented limits
Documents where it falls short ("50k units / month included").
Open sourceTesting method
Describes how it was tested ("Evaluation Setup"; includes Dataset).
Open sourceRecent product updates
Public changelog with versioned entries (found 2026-07-28).
Open sourceAsk before you buy
These questions come from the information we could not verify on the public site.
- What measurable result has a customer like us achieved?
Compare the field
Showing 12 of 22 that match your filters.
Langfuselangfuse.com
8/10website evidence$29 / month
Measured results not verified.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- Measured results not verified
Galileogalileo.ai
10/10website evidence$100 /month
Publishes more buying evidence than Langfuse. Much dearer at $100 a month against $29. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
DeepEvalconfident-ai.com
8.5/10website evidencefree tier
Publishes about as much buying evidence as Langfuse. Much dearer at $200 a month against $29. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Shows how it was tested
- Actively maintained
- Product limits not verified
Portkeyportkey.ai
8.5/10website evidence$49/month
Publishes about as much buying evidence as Langfuse. Dearer at $49 a month against $29. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- Testing method not verified
Promptfoopromptfoo.dev
9/10website evidencefree tier
Publishes about as much buying evidence as Langfuse. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Recent updates not verified
Agentaagenta.ai
6.5/10website evidence$29 /month
Publishes about as much buying evidence as Langfuse. Same price, $29 a month. Testing method not verified, though Langfuse publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
Braintrustbraintrust.dev
6.5/10website evidencepricing published
Publishes about as much buying evidence as Langfuse. Testing method not verified, though Langfuse publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
Freeplayfreeplay.ai
7.5/10website evidencepricing published
Publishes about as much buying evidence as Langfuse. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Testing method not verified
- Recent updates not verified
Heliconehelicone.ai
6.5/10website evidence$79 per month
Publishes about as much buying evidence as Langfuse. Much dearer at $79 a month against $29. Testing method not verified, though Langfuse publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
Humanloophumanloop.com
6.5/10website evidencepricing not verified
Publishes about as much buying evidence as Langfuse. Publishes a measured result, unlike Langfuse.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- Pricing not verified
- Testing method not verified
Lunarylunary.ai
6.5/10website evidence$20 / user
Publishes about as much buying evidence as Langfuse. Testing method not verified, though Langfuse publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
Patronuspatronus.ai
7.5/10website evidence$25/ Month
Publishes about as much buying evidence as Langfuse. Cheaper at $25 a month against $29. Publishes a measured result, unlike Langfuse.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Testing method not verified
- Recent updates not verified
PromptLayerpromptlayer.com
7/10website evidence$49 per month
Publishes about as much buying evidence as Langfuse. Dearer at $49 a month against $29. Recent updates not verified, though Langfuse publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- Measured results not verified
- Recent updates not verified
Read in August 2026 from pages anyone can open. This is what each company puts on its own site, which is not the same as how good the product is. Something excellent can still tell you very little. Spotted a mistake? Tell us and we will read it again.
Compare a product we have not covered