Langfuse vs Testllm
Langfuse vs Testllm, compared side by side on 11 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Langfuse is on 55/100 and Testllm on 9/100.
Where each one leads
Langfuse
- our overall score: 55/100 against 9/100
Testllm
- agent readiness: 74/100 against 43/100
At a glance
| Measure | Langfuse | Testllm |
|---|---|---|
| What it is | Open-source LLM engineering platform for debugging, monitoring, and improving production-grade LLM applications. | Detects if Claude API is genuine and identifies backend sources like Anthropic, AWS Bedrock, and Google Vertex. |
| Category | MLOps, Observability, Developer Tools, API Platform | AI Testing, Foundation Model, Large Language Model, API Platform |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Software |
| Founded | 2022 | Not published |
| Headquarters | Berlin, Germany | Not published |
| Status | Active | Active |
Size, funding and growth
| Measure | Langfuse | Testllm |
|---|---|---|
| Employees | 21 | Not published |
| Headcount growthLast 12 months | +81.0% | Not published |
| Total funding | $2.5M | Not published |
| Latest round | Seed | Not published |
| LinkedIn followers | 13,143 | Not published |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Langfuse | Testllm |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 55/100 | 9/100 |
| Traction | 45/100 | Not published |
| Team | 70/100 | Not published |
| Search visibility | 58/100 | 8/100 |
| Quality | 58/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (43/100) | B (74/100) |
| Domain ratingLink authority, 0-100 | 79/100 | Not published |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Langfuse | Testllm |
|---|---|---|
| Hosting | Vercel | Self Managed |
| CDN | Vercel | Not detected |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Analytics | Google Analytics 4, Google Tag Manager, Segment | Microsoft Clarity |
| Support stack | HubSpot | Not detected |
| Open source | Yes | No |
Product and pricing
| Measure | Langfuse | Testllm |
|---|---|---|
| Key features | Full Context Tracing, Cost & Latency Monitoring, Output Quality Evaluation, Prompt Management & Experimentation, Testing & Benchmarking | Not published |
Langfuse vs Testllm: common questions
Which is better, Langfuse or Testllm?
On our 0-100 score Langfuse rates higher (55/100 against 9/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 11 data points above: read the rows that match what you are buying for.
How do Langfuse and Testllm compare on the numbers?
Langfuse leads on our overall score (55/100 against 9/100). Testllm leads on agent readiness (74/100 against 43/100).
Read the full Langfuse review and pricing or the Testllm review and pricing. You can also browse other Langfuse alternatives we track.