Reviewed by Harsh Desai · Last reviewed:
Fluq
An AI agent observability platform that delivers waterfall timelines and exact cost tracking
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What does Fluq do?
- •No-code proxy setup connect via single environment variable with zero SDK or code changes required.
- •Waterfall timelines view every LLM call, tool use, file operation and agent decision in sequence.
- •Exact tracking monitor token counts, costs and durations per span and per agent in real time.
- •Central dashboard replace scattered logs across providers and frameworks with one unified view.
- •Broad compatibility support OpenAI, Anthropic, Google, LangChain, CrewAI plus any OpenAI-compatible endpoint.
- •Policy engine enforce rules and budget alerts on Pro and Team plans to control spend.
- •Audit trails review complete decision paths and token usage across agent fleets.
- •Event scaling handle 50K events on Free, 500K on Pro and 5M on Team/mo.
- •Retention options access 7-day, 30-day or 90-day data retention depending on chosen tier.
- •Overage flexibility pay $0.10 or $0.08 per 1K extra events on paid plans beyond included limits.
- •Agent limits manage up to 10 agents on Free, 50 on Pro and unlimited on Team.
- •Proxy Variable Set one environment variable to enable observability across any OpenAI-compatible endpoint with zero code changes.
- •Span Metrics View precise per-span token counts, costs and durations for every LLM call, tool use and agent decision.
- •Unified View Access all agent activity in one dashboard instead of hunting through scattered logs from multiple providers.
- •Tiered Limits Upgrade to Pro tier at $29/mo for 500K events, budget alerts and policy enforcement capabilities.
Pricing:
- •Free $0 50K events/mo, 10K traces, 10 agents, 7-day retention and hard cap.
- •Pro $29/mo 500K events included, 100K traces, 50 agents, 30-day retention plus overage at $0.10 per 1K.
- •Team $99/mo 5M events included, 1M traces, unlimited agents, 90-day retention and overage at $0.08 per 1K.
What are Fluq's limitations?
- •Hard caps on Free free tier stops at event limits with no overage option available.
- •Shorter retention lower plans keep data for only 7 or 30 days instead of 90.
- •Proxy routing required all agent traffic must route through the Fluq proxy to function.
- •No self-hosting on-premise or private deployment options are not available.
Our Verdict
For the Vibe Builder, Fluq delivers an effortless observability layer that turns chaotic agent swarms into visually satisfying flows you can actually vibe with. Its clean dashboards surface cost spikes and policy violations in real time so creative builders stay in the zone instead of debugging infrastructure. The policy enforcement engine lets you define guardrails once and forget them while the agents run wild within safe bounds. This combination of beautiful tracing and automatic cost tracking removes the usual friction that kills momentum when prototypes suddenly balloon into expensive reality.
For the Developer, Fluq offers straightforward SDK integration and proxy-based routing that captures every LLM call without forcing major code rewrites. Automatic trace generation combined with granular cost attribution helps engineering teams ship reliable agents faster and keep cloud bills predictable. The included policy engine lets developers codify safety and compliance rules directly in configuration rather than scattering checks throughout codebases. Overall the platform reduces cognitive load by centralizing observability telemetry and usage analytics into one reliable service.
One honest limitation is that the free tier imposes hard event caps with no overage option while Pro and Team plans offer progressively shorter retention windows than many competitors which can constrain long-term debugging. Routing all agent traffic through the Fluq proxy adds a potential point of latency and creates vendor dependency since no self-hosting or on-premise deployment is available. These constraints may feel restrictive for teams needing complete data sovereignty or extended historical analysis. Overall the product earns a 7.5/10 for balancing usability against these practical trade-offs.
Skip it if you need on-premise control or longer retention and consider LangSmith instead.
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Frequently Asked Questions
What is Fluq and how does its proxy work?
Fluq is an observability platform designed for monitoring AI agents and LLM applications. Its proxy works by sitting between your AI calls and the model providers to automatically capture events, traces, and metrics without requiring code changes in most cases. This setup lets you gain real-time visibility into agent behavior, costs, and performance directly from the Fluq dashboard.
What does the free Fluq plan include?
The free Fluq plan includes a limited tier for getting started with basic monitoring. It comes with 50K events per month, 10K traces, support for up to 10 agents, and 7-day data retention under a hard cap. This makes it suitable for small experiments or personal projects without any upfront cost.
How does Fluq pricing work in 2026?
Fluq pricing in 2026 includes a Free $0 tier, Pro at $29 per month, and Team at $99 per month, with overage charges of $0.10 per 1K events on Pro and $0.08 per 1K on Team. Each paid plan bundles a set number of events, traces, agents, and retention days, then charges the listed overage rates if you exceed the included amounts. This structure keeps costs predictable while scaling with your usage.
Who should use Fluq for AI agent monitoring?
Developers building or running production AI agents should use Fluq for AI agent monitoring because it provides automatic tracing, cost tracking, and error detection with minimal setup. Teams that need longer retention and unlimited agents will especially benefit from its proxy-based approach that works across different LLM providers. It is ideal for anyone who wants to debug agent loops or optimize token spend without heavy instrumentation.
Fluq vs LangSmith, which should I choose as an alternative?
Fluq and LangSmith both offer solid tracing for LLM apps, but Fluq stands out if you want a lightweight proxy that requires less code integration and focuses heavily on agent-specific metrics. Choose Fluq as an alternative when your priority is quick setup, competitive overage rates, and extended retention on the Team plan. LangSmith might fit better if you are already deep in the LangChain ecosystem and need its specialized evaluation tools.
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Fluq
Free tier available