Prefactor
Evaluate your AI Agents in real-time
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Most agents pass their evals and fail in production. Prefactor is the evaluation layer that closes the gap. We score every agent run in real time, surface quality regressions and drift as they happen, and show engineering teams exactly how their agents are performing at scale. Built for the teams shipping agents to customers.
PH · launched Jul 28, 2026 · 583 upvotes (top 4%) · 0 views
Niche: ai agent evaluation platforms · 182 launches, 8 in the last 7 days ▼ -50% · Explore this niche →
Category and tags
- Horizontal
- Observability & eval
- Developer
- AI-native
- Commercial product
- SaaS
- Developer Tools
- Artificial Intelligence
Visit website ↗ Source listing ↗
More like this: all 182 launches in ai agent evaluation platforms →
Could you build this?
Partial Basic LLM evaluation dashboards are easy to build, but high-throughput real-time tracing, low-latency evaluation scoring, and automated drift detection at scale require specialized streaming infrastructure.
What it would actually take: This requires an OpenTelemetry-compatible tracing collector (ClickHouse, Kafka/Redpanda), real-time stream processing to compute statistical drift across millions of tokens, and secondary async evaluation LLM judge pipelines. The difficult problems are keeping evaluation latency and cost near zero while avoiding alert fatigue and hallucination in the evaluators themselves.
Competitors
Other products that read as similar to this one : 460 launches clear the similarity bar, closest 8 shown.
Attention rank: #33 of 461 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 267 days after the earliest competitor.
- Predflow AI · ph · 2026-04-06 · 183 upvotes · similarity 0.48
- AgentX · ph · 2026-06-22 · 523 upvotes · similarity 0.46
- Agent Gate · ph · 2026-09-18 · 1 upvotes · similarity 0.46
- Vigilator · ph · 2026-09-14 · 1 upvotes · similarity 0.45
- Agent Mode on Arena · ph · 2026-06-05 · 188 upvotes · similarity 0.45
- Fabraix · ph · 2026-05-08 · 196 upvotes · similarity 0.44
- Benchmark your eng team's AI agent maturity in 5 minutes · hn · 2026-07-14 · 14 upvotes · similarity 0.42
- Logic · ph · 2026-04-27 · 274 upvotes · similarity 0.41
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.