LLM observability pack
The LLM observability pack is a curated bundle of 14 verified offers. 11 free tiers and 3 startup programs; 11 need no application. Free plans and startup deals for tracing, logging and evaluating LLM apps and agents: Langfuse, PostHog AI observability, LangSmith, Helicone, Opik, Traceloop, Laminar, Logfire, Arize AX, Portkey and Braintrust.
Who it’s for: Anyone shipping an LLM app or agent who needs traces, evals or request logs. The free plans need only a signup; the startup deals have their own eligibility rules.
No offers match these filters.
How pack totals work
No pack total is shown: only 1 of 14 offers have a countable one-time USD amount (we require at least half). The breakdown below shows each offer’s countable amount, if any.
| Offer | Vendor wording | Counted |
|---|---|---|
| Langfuse | Hobby plan: 50k units / month included, free (no card) | Not counted: recurring or usage-based amount |
| PostHog | Monthly free allowance on every product: 1M analytics events, 5K session recordings, 1M feature flag requests, 100K AI observability events | Not counted: recurring or usage-based amount |
| LangChain (LangSmith) | Developer plan $0: up to 5k base traces/month | Not counted: recurring or usage-based amount |
| Helicone | 10,000 free requests/month | Not counted: recurring or usage-based amount |
| Comet (Opik) | Free cloud plan: 25k spans per month, up to 10 team members | Not counted: recurring or usage-based amount |
| Traceloop | Free forever: up to 50K spans/month | Not counted: recurring or usage-based amount |
| Laminar | Free: 1 GB of trace data, 7-day data access, 1 project | Not counted: no explicit amount stated |
| Pydantic Logfire | $20/month of free usage (10 million spans, logs or metrics) on every plan | Not counted: recurring or usage-based amount |
| Arize AI | AX Free: 25k trace spans and 1 GB ingestion per month, 15-day retention, unlimited users | Not counted: recurring or usage-based amount |
| Portkey | Developer plan free forever: 10k recorded logs per month | Not counted: recurring or usage-based amount |
| Braintrust | $10 credits/month included on Starter ($0) | Not counted: recurring or usage-based amount |
| Langfuse | 50% off entire Langfuse bill for 12 months | Not counted: no explicit amount stated |
| LangChain (LangSmith) | $10K in LangSmith credits available for 1 year | $10,000 |
| Braintrust | Pro plan free for 6–12 months | Not counted: no explicit amount stated |
* Totals are maximums. Eligibility varies by program, many offers can’t be combined with each other, and most teams will qualify for only some of them. Always check each vendor’s page.
Frequently asked questions
What is in the LLM observability pack?
14 offers: Free plans and startup deals for tracing, logging and evaluating LLM apps and agents: Langfuse, PostHog AI observability, LangSmith, Helicone, Opik, Traceloop, Laminar, Logfire, Arize AX, Portkey and Braintrust.
How much is the LLM observability pack worth?
We don’t show a total for this pack (fewer than half the offers have a countable one-time USD amount). Headline: 11 free tiers and 3 startup programs.
Do I need to apply?
11 of the 14 offers need no application (free tiers, signup credits or promo codes); the rest are programs you apply for on the vendor’s page.
Get new perks for this pack before they’re listed
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