Keywords AI vs LangChain: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Keywords AI and LangChain side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Keywords AI leads on lower entry price; LangChain leads on higher user rating. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Keywords AI
The AI gateway with built-in observability for LLM applications.
Best for you if:
- • You want simplifies LLM integration with a unified API
LangChain
Build LLM-powered applications
Best for you if:
- • You want great for AI apps
| At a Glance | Keywords AI | LangChain |
|---|---|---|
Starts at | Free plan, paid from $7/user/mo, billed monthly Pro plan | Free plan, paid from $39/mo, billed monthly Plus plan |
Category | Developer Tools AI & Automation | AI Agents Developer Tools |
Rating | 4.3/5 SourceForge 4.3 67 reviews | 4.6/5 G2 4.5 · SourceForge 5.0 127 reviews |
Free plan | Yes | Yes |
Watch out for | Log overages not explicitly detailed | Potential overage fees for traces |
Choose Keywords AI or LangChain?
Choose Keywords AI if
- You want simplifies LLM integration with a unified API
- You want enables easy A/B testing of prompts and models
- Budget matters ($7/user/mo, billed monthly vs $39/mo, billed monthly)
- You work in developer tools, not AI agents
Choose LangChain if
- You want great for AI apps
- You want active development
- You work in AI agents, not developer tools
In-Depth Analysis
Keywords AI
The AI gateway with built-in observability for LLM applications.
Keywords AI offers a fair pricing structure, especially with its generous Free tier and competitive Pro tier at $7/user/month.
Watch out
Log overages not explicitly detailed
Strengths
- Pro: Simplifies LLM integration with a unified API
- Pro: Enables easy A/B testing of prompts and models
- Pro: Provides comprehensive observability for LLM requests
- Pro: Designed for scalability and high concurrency
- Pro: Facilitates data collection for model fine-tuning
Weaknesses
- Con: Specific pricing details are not immediately available on the homepage
- Con: May require some initial setup to integrate with existing LLM applications
Key features
LangChain
Build LLM-powered applications
LangChain's pricing is quite generous, especially with a robust free Developer tier offering 5,000 traces/month.
Watch out
Potential overage fees for traces
Strengths
- Pro: Great for AI apps
- Pro: Active development
- Pro: Large community
Weaknesses
- Con: Fast changing API
- Con: Can be complex
Key features
Plans and prices: Keywords AI vs LangChain
| Tool | Plans and prices | Source |
|---|---|---|
| Keywords AI |
| keywordsai.co/pricing read Sep 30, 2026 |
| LangChain |
| langchain.com/pricing read Oct 2, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Keywords AI pricing and LangChain pricing.
Key Takeaways
Keywords AI
- Lower entry price: $7/user/mo, billed monthly vs $39/mo, billed monthly
LangChain
- Higher user rating: 4.6/5 vs 4.3/5
What the data shows
On the data below, Keywords AI leads on lower entry price; LangChain leads on higher user rating. We do not name an overall winner for this pair.
- LangChain has the higher user rating (4.3/5 from 67 reviews for Keywords AI, 4.6/5 from 127 reviews for LangChain).
- Keywords AI has the lower entry price: $7/user/mo, billed monthly (Pro) against $39/mo, billed monthly (Plus) for LangChain.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Keywords AI and LangChain compare in 2026?
On the data below, Keywords AI leads on lower entry price; LangChain leads on higher user rating. We do not name an overall winner for this pair. LangChain has the higher user rating (4.3/5 from 67 reviews for Keywords AI, 4.6/5 from 127 reviews for LangChain). Keywords AI has the lower entry price: $7/user/mo, billed monthly (Pro) against $39/mo, billed monthly (Plus) for LangChain. Both have a free plan.
What are Keywords AI and LangChain used for?
Keywords AI: The AI gateway with built-in observability for LLM applications. LangChain: Build LLM-powered applications.
What does Keywords AI cost vs LangChain?
Keywords AI's cheapest paid plan is Pro at $7/user/mo, billed monthly; it also has a free plan. LangChain's cheapest paid plan is Plus at $39/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 2, 2026.
What's the main difference between Keywords AI and LangChain?
Keywords AI's main strength: simplifies LLM integration with a unified API. LangChain's main strength: great for AI apps.