> Markdown copy of https://perq.sh/packs/llm-observability-pack (LLM observability pack | Perq), generated 2026-11-08. Index of every page for agents: https://perq.sh/llms.txt. Search API and MCP server: https://perq.sh/agents.
> 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.

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# 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.

**14** offers

**11 free tiers and 3 startup programs** no pack total shown

**Nov 8, 2026, 6:11 AM ET** latest verification

| Vendor | Offer | Category | Type | Eligibility | Source | Last verified |
| --- | --- | --- | --- | --- | --- | --- |
| [Langfuse](https://perq.sh/offers/langfuse-hobby-free) | [Hobby plan: 50k units / month included, free (no card)](https://perq.sh/offers/langfuse-hobby-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [langfuse.com ↗](https://langfuse.com/pricing) | Nov 8, 2026, 6:11 AM ET |
| [PostHog](https://perq.sh/offers/posthog-free) | [Monthly free allowance on every product: 1M analytics events, 5K session recordings, 1M feature flag requests, 100K AI observability events](https://perq.sh/offers/posthog-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [posthog.com ↗](https://posthog.com/pricing) | Nov 8, 2026, 6:11 AM ET |
| [LangChain (LangSmith)](https://perq.sh/offers/langsmith-developer-free) | [Developer plan $0: up to 5k base traces/month](https://perq.sh/offers/langsmith-developer-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Solo users | [langchain.com ↗](https://www.langchain.com/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Helicone](https://perq.sh/offers/helicone-hobby) | [10,000 free requests/month](https://perq.sh/offers/helicone-hobby) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [helicone.ai ↗](https://www.helicone.ai/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Comet (Opik)](https://perq.sh/offers/opik-free) | [Free cloud plan: 25k spans per month, up to 10 team members](https://perq.sh/offers/opik-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [comet.com ↗](https://www.comet.com/site/pricing/) | Nov 8, 2026, 6:11 AM ET |
| [Traceloop](https://perq.sh/offers/traceloop-free) | [Free forever: up to 50K spans/month](https://perq.sh/offers/traceloop-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [traceloop.com ↗](https://www.traceloop.com/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Laminar](https://perq.sh/offers/laminar-free) | [Free: 1 GB of trace data, 7-day data access, 1 project](https://perq.sh/offers/laminar-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [lmnr.ai ↗](https://www.lmnr.ai/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Pydantic Logfire](https://perq.sh/offers/pydantic-logfire-free) | [$20/month of free usage (10 million spans, logs or metrics) on every plan](https://perq.sh/offers/pydantic-logfire-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone; the Personal plan is free with no credit card | [pydantic.dev ↗](https://pydantic.dev/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Arize AI](https://perq.sh/offers/arize-ax-free) | [AX Free: 25k trace spans and 1 GB ingestion per month, 15-day retention, unlimited users](https://perq.sh/offers/arize-ax-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone; no credit card required | [arize.com ↗](https://arize.com/pricing/) | Nov 8, 2026, 6:11 AM ET |
| [Portkey](https://perq.sh/offers/portkey-free) | [Developer plan free forever: 10k recorded logs per month](https://perq.sh/offers/portkey-free) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone (not for production workloads) | [portkey.ai ↗](https://portkey.ai/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Braintrust](https://perq.sh/offers/braintrust-starter) | [$10 credits/month included on Starter ($0)](https://perq.sh/offers/braintrust-starter) | [Observability & analytics](https://perq.sh/category/observability) | [free tier](https://perq.sh/type/free-tier) | Anyone | [braintrust.dev ↗](https://www.braintrust.dev/pricing) | Nov 8, 2026, 6:11 AM ET |
| [Langfuse](https://perq.sh/offers/langfuse-startups) | [50% off entire Langfuse bill for 12 months](https://perq.sh/offers/langfuse-startups) | [Observability & analytics](https://perq.sh/category/observability) | [startup program](https://perq.sh/type/startup-program) | Early-stage, bootstrapped or <$5M raised | [langfuse.com ↗](https://langfuse.com/startups) | Nov 8, 2026, 6:11 AM ET |
| [LangChain (LangSmith)](https://perq.sh/offers/langsmith-startups) | [$10K in LangSmith credits available for 1 year](https://perq.sh/offers/langsmith-startups) | [Observability & analytics](https://perq.sh/category/observability) | [startup program](https://perq.sh/type/startup-program) | Early-stage startups backed by LangChain premier VC partners | [langchain.com ↗](https://www.langchain.com/startups) | Nov 8, 2026, 6:11 AM ET |
| [Braintrust](https://perq.sh/offers/braintrust-startups) | [Pro plan free for 6–12 months](https://perq.sh/offers/braintrust-startups) | [Observability & analytics](https://perq.sh/category/observability) | [startup program](https://perq.sh/type/startup-program) | Qualifying startups | [braintrust.dev ↗](https://www.braintrust.dev/pricing) | Nov 8, 2026, 6:11 AM ET |

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](https://perq.sh/offers/langfuse-hobby-free) | Hobby plan: 50k units / month included, free (no card) | Not counted: recurring or usage-based amount |
| [PostHog](https://perq.sh/offers/posthog-free) | 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)](https://perq.sh/offers/langsmith-developer-free) | Developer plan $0: up to 5k base traces/month | Not counted: recurring or usage-based amount |
| [Helicone](https://perq.sh/offers/helicone-hobby) | 10,000 free requests/month | Not counted: recurring or usage-based amount |
| [Comet (Opik)](https://perq.sh/offers/opik-free) | Free cloud plan: 25k spans per month, up to 10 team members | Not counted: recurring or usage-based amount |
| [Traceloop](https://perq.sh/offers/traceloop-free) | Free forever: up to 50K spans/month | Not counted: recurring or usage-based amount |
| [Laminar](https://perq.sh/offers/laminar-free) | Free: 1 GB of trace data, 7-day data access, 1 project | Not counted: no explicit amount stated |
| [Pydantic Logfire](https://perq.sh/offers/pydantic-logfire-free) | $20/month of free usage (10 million spans, logs or metrics) on every plan | Not counted: recurring or usage-based amount |
| [Arize AI](https://perq.sh/offers/arize-ax-free) | AX Free: 25k trace spans and 1 GB ingestion per month, 15-day retention, unlimited users | Not counted: recurring or usage-based amount |
| [Portkey](https://perq.sh/offers/portkey-free) | Developer plan free forever: 10k recorded logs per month | Not counted: recurring or usage-based amount |
| [Braintrust](https://perq.sh/offers/braintrust-starter) | $10 credits/month included on Starter ($0) | Not counted: recurring or usage-based amount |
| [Langfuse](https://perq.sh/offers/langfuse-startups) | 50% off entire Langfuse bill for 12 months | Not counted: no explicit amount stated |
| [LangChain (LangSmith)](https://perq.sh/offers/langsmith-startups) | $10K in LangSmith credits available for 1 year | $10,000 |
| [Braintrust](https://perq.sh/offers/braintrust-startups) | 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

Newly verified free AI credits and perks reach subscribers about 24 hours before they appear here, plus closures and changes. One short email on days with something new, nothing on quiet days. Double opt-in, one-click unsubscribe. Agents: use the [webhook, feed or MCP](https://perq.sh/agents#early-access).

Sent by Avatar 8 LLC via Cooper Email. We only use your address for these emails. See the [early-access page](https://perq.sh/newsletter).

![Example Perq early-access email: new perks before they're on perq.sh](/images/early-access-digest.webp)

What subscribers get: new perks a day before they’re public

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Published by Avatar 8 (Avatar 8 LLC), ops@avatar33.com. Data: https://perq.sh/api/offers.json · OpenAPI: https://perq.sh/openapi.json