Arthur AI vs Evidently AI: 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 Arthur AI and Evidently AI side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Evidently AI leads on lower entry price. 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:
Arthur AI
The full lifecycle platform for evaluating and shipping reliable AI agents fast.
Best for you if:
- • You want ensures high reliability and performance of AI systems
Evidently AI
Evaluate and monitor your AI systems for safety, reliability, and performance.
Best for you if:
- • You want built on a popular open-source framework with a large community
| At a Glance | Arthur AI | Evidently AI |
|---|---|---|
Starts at | Free plan, paid from $60/mo, billed monthly Premium plan | Free plan, paid from $50/mo, billed monthly Pro plan |
Category | AI Agents Testing & QA | AI Observability Testing & QA |
Rating | n/a | n/a |
Free plan | Yes | Yes |
Watch out for | Professional Services are an add-on | Overage fees for data rows not explicitly stated |
Choose Arthur AI or Evidently AI?
Choose Arthur AI if
- You want ensures high reliability and performance of AI systems
- You want reduces maintenance workload for AI models by up to 50%
- You work in AI agents, not AI observability
Choose Evidently AI if
- You want built on a popular open-source framework with a large community
- You want comprehensive suite of metrics and evaluation capabilities for various AI systems
- Budget matters ($50/mo, billed monthly vs $60/mo, billed monthly)
- You work in AI observability, not AI agents
In-Depth Analysis
Arthur AI
The full lifecycle platform for evaluating and shipping reliable AI agents fast.
Arthur AI's pricing structure is quite generous, especially with its feature-rich Free tier.
Watch out
Professional Services are an add-on
Strengths
- Pro: Ensures high reliability and performance of AI systems.
- Pro: Reduces maintenance workload for AI models by up to 50%.
- Pro: Offers robust security features with built-in guardrails.
- Pro: Highly flexible and supports a wide range of AI models and deployment environments.
- Pro: Provides comprehensive tools for the entire AI lifecycle, from experimentation to production monitoring.
Weaknesses
- Con: Advanced features like dedicated VPCs and custom evals are only available on Enterprise plans.
- Con: The free tier has limitations on data retention, use cases, and monitoring metrics.
- Con: Requires integration and setup, which might have a learning curve for new users.
Key features
Evidently AI
Evaluate and monitor your AI systems for safety, reliability, and performance.
Evidently AI offers a generous free Developer tier, making it highly accessible for individual users and small projects.
Watch out
Overage fees for data rows not explicitly stated
Strengths
- Pro: Built on a popular open-source framework with a large community.
- Pro: Comprehensive suite of metrics and evaluation capabilities for various AI systems.
- Pro: Supports both LLM-powered and traditional ML models.
- Pro: Offers continuous testing and monitoring to catch issues early.
- Pro: Provides advisory services and training for effective implementation.
Weaknesses
- Con: Advanced features like synthetic data and adversarial testing are in higher-tier plans.
- Con: Pricing for higher tiers can be significant for smaller teams.
- Con: Requires integration into existing AI/ML pipelines.
Key features
Plans and prices: Arthur AI vs Evidently AI
| Tool | Plans and prices | Source |
|---|---|---|
| Arthur AI |
| arthur.ai/pricing read Oct 15, 2026 |
| Evidently AI |
| evidentlyai.com/pricing read Oct 8, 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 Arthur AI pricing and Evidently AI pricing.
Key Takeaways
Arthur AI
- Choose if you want the full lifecycle platform for evaluating and shipping reliable AI agents fast
Evidently AI
- Lower entry price: $50/mo, billed monthly vs $60/mo, billed monthly
What the data shows
On the data below, Evidently AI leads on lower entry price. We do not name an overall winner for this pair.
- Evidently AI has the lower entry price: $50/mo, billed monthly (Pro) against $60/mo, billed monthly (Premium) for Arthur AI.
- 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 Arthur AI and Evidently AI compare in 2026?
On the data below, Evidently AI leads on lower entry price. We do not name an overall winner for this pair. Evidently AI has the lower entry price: $50/mo, billed monthly (Pro) against $60/mo, billed monthly (Premium) for Arthur AI. Both have a free plan.
What are Arthur AI and Evidently AI used for?
Arthur AI: The full lifecycle platform for evaluating and shipping reliable AI agents fast. Evidently AI: Evaluate and monitor your AI systems for safety, reliability, and performance.
What does Arthur AI cost vs Evidently AI?
Arthur AI's cheapest paid plan is Premium at $60/mo, billed monthly; it also has a free plan. Evidently AI's cheapest paid plan is Pro at $50/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 15, 2026.
What's the main difference between Arthur AI and Evidently AI?
Arthur AI's main strength: ensures high reliability and performance of AI systems. Evidently AI's main strength: built on a popular open-source framework with a large community.