Alternatives
Best LangSmith alternatives in 2026
Data compiled by Toolradar Updated How we rate
Cite this list: Toolradar, best LangSmith alternatives 2026, toolradar.com/alternatives/langsmith
8 direct alternatives to LangSmith, compared on pricing, features, and best-for use cases. Pick the right replacement without the marketing fluff.
Quick answer
- Google Gemini is the top alternative to LangSmith on our list, followed by Datadog and Weights & Biases.
- 5 of the 8 alternatives have a free plan, starting with Google Gemini.
- Highest rated: Weights & Biases, 4.6 out of 5 from 57 ratings, Aug 2026.
- 8 alternatives
- 5 with a free plan
Top 3 alternatives to LangSmith
Google Gemini
#1 Top pickGoogle's advanced AI models with multimodal understanding and deep integration
Starting price
From $4.99 /mo
Cheapest paid plan, monthly, as of November 2026
3.4 /5 across Trustpilot, G2 and Capterra · 1,177 ratings, Sep 2026
Our take
Best overall
Datadog
#2Cloud monitoring, security, and AI investigations for DevOps
Starting price
From $8 /mo
Cheapest paid plan, monthly, as of November 2026
4.4 /5 on G2 · 726 ratings, Aug 2026
Track, compare, and share ML experiments and models
Starting price
From $60 /mo
Cheapest paid plan, monthly, as of November 2026
4.6 /5 on G2 · 57 ratings, Aug 2026
Our take
Highest rated
LangSmith vs 8 alternatives
| Tool | Starting price (Nov 2026) | Free plan | Rating |
|---|---|---|---|
 | Price: $39/mo | Free plan: Yes | n/a |
| Price: $4.99/mo | Free plan: Yes | 3.4 out of 5, from 1,177 ratings across Trustpilot, G2 and Capterra (1,177) |
| Price: $8/mo | Free plan: No | 4.4 out of 5, from 726 ratings on G2 (726) |
| Price: $60/mo | Free plan: Yes | 4.6 out of 5, from 57 ratings on G2 (57) |
 | Price: $50/mo | Free plan: Yes | 4.3 out of 5, from 48 ratings on G2 (48) |
 | Price: $19/mo | Free plan: No | 4.3 out of 5, from 26 ratings on G2 (26) |
 | Price: Not published | Free plan: No | 3.7 out of 5, from 8 ratings on G2 (8) |
 | Price: $249/mo | Free plan: Yes | n/a |
 | Price: $29/mo | Free plan: Yes | n/a |
Why people consider alternatives to LangSmith
LangSmith is an observability platform designed to help teams build and ship reliable AI agents and LLM applications. It provides robust tracing capabilities to quickly debug non-deterministic LLM app behavior, allowing developers to see…
Here are the real cost and limitation gotchas that push teams to look elsewhere:
- Traces over the included 5k/10k are pay-as-you-go. Seats are only the floor.
- Base traces last 14 days. Extended traces (400 days) cost extra.
- Fleet on Developer pauses after 5 LCU/month until reset or Plus.
The 8 alternatives below cover the same core job (AI agents) with different trade-offs.
LangSmith by the numbers
Toolradar data: It is listed as an alternative to 22 other tools on Toolradar, ranking #4 of 95 in Debugging. As of Nov 2026.
- #31 (joint) most-listed alternative in AI Agents, out of 1068 tools in AI Agents. Source: Toolradar data, Nov 2026.
- #66 (joint) most-listed alternative in Developer Tools, out of 1876 tools in Developer Tools. Source: Toolradar data, Nov 2026.
- #4 most-listed alternative in Debugging, out of 95 tools in Debugging. Source: Toolradar data, Nov 2026.
| Metric | LangSmith | Peer median | Position (1 is best) |
|---|---|---|---|
| Free plan | Yes | 83% have one | n/a |
| Listed as an alternative to | 22 tools | 1 | #4 of 95 |
| Compare-page visits, last 30 days | 94 visits | 26 | #3 of 34 tools with 20+ compare-page visits |
Listed as an alternative to: #4 on 2026-10-16 to #4 on 2026-11-11 (rank among 95 tools, 1 is best).
Each position is counted among the tools that have data for that row, as noted under it. All Debugging data · How we compute this. Advertising and placement fees are not inputs to any position. Visit counts include visits from every source.
Cite this: Toolradar, “LangSmith by the numbers”, Nov 2026.
AI Agents leaderboards from Toolradar data
Toolradar ranks AI Agents tools on one measure at a time, only where at least 8 tools have data. As of Nov 2026.
Lowest entry price, plans with no stated unit
Cheapest standard paid plan per month (annual prices divided by 12), read on vendor pages and compared only with tools priced on the same basis.
Counted among 279 tools with no stated price unit, verified price.
| # | Tool | Entry plan |
|---|---|---|
| 1 | Plivo | $0.50/mo, billed monthly |
| 2 | Scout by Fini | $0.69/mo |
| 3 | Murmell | $0.99/mo, billed monthly |
| 4 | TryCase | $1/mo |
| 5 | Tencent EdgeOne Makers | $1.40/mo, billed monthly |
Lowest entry price, flat team plans
Cheapest standard paid plan per month (annual prices divided by 12), read on vendor pages and compared only with tools priced on the same basis.
Counted among 77 tools priced as a flat team plan, verified price.
| # | Tool | Entry plan |
|---|---|---|
| 1 | Lucid Train | $3/mo flat, billed monthly |
| 2 | API to MCP | $4.99/mo flat, billed monthly |
| 2 | Google Gemini | $4.99/mo flat, billed monthly |
| 4 | Bento | $5/mo flat, billed monthly |
| 5 | Orkas | $5.99/mo flat, billed monthly |
Lowest entry price, per-user plans
Cheapest standard paid plan per month (annual prices divided by 12), read on vendor pages and compared only with tools priced on the same basis.
Counted among 51 tools priced per user, verified price.
| # | Tool | Entry plan |
|---|---|---|
| 1 | Agent Browser Shield | $4/user/mo, billed monthly |
| 1 | Bodhiorchard | $4/user/mo, billed monthly |
| 1 | Google Workspace CLI | $4/user/mo, billed monthly |
| 1 | Heron | $4/user/mo, billed monthly |
| 1 | Joanium | $4/user/mo, billed monthly |
Most visited, last 30 days
Distinct visitor sessions on the tool's Toolradar page over the last 30 days, with bots excluded by our analytics. A session counts once however many times it reloads the page.
Counted among 8 tools with 50+ visits.
| # | Tool | Visits |
|---|---|---|
| 1 | Kick | 108 visits |
| 2 | Templafy | 94 visits |
| 3 | ZenGRC | 88 visits |
| 4 | OpenClaw | 85 visits |
| 5 | Passionfroot | 73 visits |
Most media coverage, last 30 days
Number of distinct articles published in the last 30 days by independent press, blogs and newsletters that mention the tool. A story carried by several outlets counts once; the vendor's own blog, review sites, forums and republishing sites do not count.
Counted among 15 tools mentioned in the last 30 days.
| # | Tool | Articles |
|---|---|---|
| 1 | DeepSeek | 59 articles |
| 2 | Character.AI | 58 articles |
| 3 | ConnectWise | 11 articles |
| 4 | Grok Bot | 5 articles |
| 4 | UiPath | 5 articles |
A position exists only when at least 8 tools have data for that metric. 420 of 1068 AI Agents tools have a verified price; the others publish none we could read (often "contact sales"). Advertising and placement fees are not inputs to any position. Visit counts include visits from every source. How we compute this. Cite this: Toolradar, “AI Agents leaderboards”, Nov 2026. Data licensed CC BY 4.0. All AI Agents statistics.
8 alternatives to LangSmith
Ranked by G2 and Capterra ratings, media mentions, and editor review, plus how directly they replace LangSmith.
- 1
Google Gemini
Free plan Battle-tested at scaleGoogle's advanced AI models with multimodal understanding and deep integration
3.4 /5 across Trustpilot, G2 and Capterra · 1,177 ratings, Sep 2026
From $4.99/mo flat, billed monthly; free plan available
- 2
Datadog
Free planCloud monitoring, security, and AI investigations for DevOps
4.4 /5 on G2 · 726 ratings, Aug 2026
From $8/mo, billed monthly; free plan available
- 3
Weights & Biases
Free planTrack, compare, and share ML experiments and models
4.6 /5 on G2 · 57 ratings, Aug 2026
From $60/mo, billed monthly; free plan available
- 4
Arize AI
Free planThe AI & Agent Engineering Platform for LLM observability, evaluation, and development.
4.3 /5 on G2 · 48 ratings, Sep 2026
From $50/mo, billed monthly; free plan available
- 5
Comet ML
PaidMachine learning experiment tracking platform
4.3 /5 on G2 · 26 ratings, Sep 2026
From $19/user/mo, billed monthly
- 6
OpenAI API
PaidProgrammatic access to OpenAI's full model lineup: GPT-5.5, o3, gpt-image-1
3.7 /5 on G2 · 8 ratings, Aug 2026
Price not published
- 7
Braintrust
Free planObservability and evaluation platform for AI agents: trace production runs, score outputs with evals and build datasets from real traces.
From $249/mo, billed monthly; free plan available
- 8
Langfuse
Free planOpen Source LLM Engineering Platform for debugging and improving your LLM application.
From $29/mo flat, billed monthly; free plan available
Frequently asked questions
What is the best alternative to LangSmith?
Based on real-signal scoring (G2 and Capterra ratings, media mentions, and editorial review), the top alternatives to LangSmith are Google Gemini, Datadog, Weights & Biases. Each solves the same core job with different trade-offs on pricing, features, and integrations.
Is there a free alternative to LangSmith?
There is no fully free alternative in this list. Google Gemini is freemium: a permanent free tier plus paid plans (Google's advanced AI models with multimodal understanding and deep integration).
Why do people look for LangSmith alternatives?
Common reasons teams switch away from LangSmith: pricing that scales aggressively, missing integrations with the rest of their stack, performance or scale limits, or a specific feature gap in ai agents. The alternatives on this page solve the same core problem with different trade-offs.
Spotted an outdated price or a wrong fact? Suggest a correction: we check it against the vendor's own page. Work for one of these vendors? Claim your listing to update it yourself.
Side-by-side comparisons
In-depth comparison pages for LangSmith versus each alternative.
Review LangSmith, get a free AI guide
Share your experience and we will send you Improve Your Thinking Patterns Using ChatGPT, free.
Still considering LangSmith?
See the full review, pricing breakdown, and community feedback before you decide.