Neptune.ai vs Re_gent: 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 Neptune.ai and Re_gent side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a 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:
Neptune.ai
Experiment tracking for ML teams
Best for you if:
- • You want good experiment tracking
Re_gent
Version control for AI coding agents, tracking activity, prompts, and changes locally.
Best for you if:
- • You want a fully free tool (Neptune.ai requires payment)
| At a Glance | Neptune.ai | Re_gent |
|---|---|---|
Starts at | Free plan, paid from $150/user/mo, billed monthly Startup plan | Free 100% free |
Category | Analytics Developer Tools | Developer Tools Version Control |
Rating | n/a | n/a |
Free plan | Yes | Yes |
Watch out for | Potential for rapid data point/storage overages | n/a |
Choose Neptune.ai or Re_gent?
Choose Neptune.ai if
- You want good experiment tracking
- You want clean UI
- You work in analytics, not developer tools
Choose Re_gent if
- You want a fully free tool (Neptune.ai requires payment)
- You want provides deep insights into AI agent decisions and changes
- You want offers robust control over AI-generated code
- You work in developer tools, not analytics
In-Depth Analysis
Neptune.ai
Experiment tracking for ML teams
Neptune.ai's pricing, starting at $150/user/month for 'Startup' and $250/user/month for 'Lab', is on the higher end compared to some competitors, especially for smaller teams.
Watch out
Potential for rapid data point/storage overages
Strengths
- Pro: Good experiment tracking
- Pro: Clean UI
- Pro: Good integrations
- Pro: Team features
- Pro: Flexible logging
Weaknesses
- Con: Expensive
- Con: Less known than W&B
- Con: Smaller community
- Con: Some features basic
- Con: Storage limits
Key features
Re_gent
Version control for AI coding agents, tracking activity, prompts, and changes locally.
Strengths
- Pro: Provides deep insights into AI agent decisions and changes
- Pro: Offers robust control over AI-generated code
- Pro: Maintains a complete audit trail even if AI tools compact history
- Pro: Facilitates parallel work with multiple AI agents without conflicts
- Pro: Free and open-source (Apache-2.0 License)
Weaknesses
- Con: Currently in public alpha, may have limited features or stability
- Con: Limited integration with AI tools currently, though more are planned
Key features
Plans and prices: Neptune.ai vs Re_gent
| Tool | Plans and prices | Source |
|---|---|---|
| Neptune.ai |
| neptune.ai/pricing read Sep 29, 2026 |
| Re_gent | No plan prices on file | re-gent.dev |
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 Neptune.ai pricing and Re_gent pricing.
Key Takeaways
Neptune.ai
- Choose if you want experiment tracking for ML teams
Re_gent
- Choose if you want version control for AI coding agents, tracking activity, prompts, and changes locally
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Neptune.ai starts at $150/user/mo, billed monthly; Re_gent has no public paid plan price on file.
- 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 Neptune.ai and Re_gent compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Neptune.ai starts at $150/user/mo, billed monthly; Re_gent has no public paid plan price on file. Both have a free plan.
What are Neptune.ai and Re_gent used for?
Neptune.ai: Experiment tracking for ML teams. Re_gent: Version control for AI coding agents, tracking activity, prompts, and changes locally.
What does Neptune.ai cost vs Re_gent?
Neptune.ai's cheapest paid plan is Startup at $150/user/mo, billed monthly; it also has a free plan. Re_gent is free. Prices read on the vendors' pricing pages, latest check Sep 29, 2026.
What's the main difference between Neptune.ai and Re_gent?
Neptune.ai's main strength: good experiment tracking. Re_gent's main strength: provides deep insights into AI agent decisions and changes.