kitio.aiPostHog vs Voxel51
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. PostHog starts at See pricing page and Voxel51 starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Product analytics
- Session replay
- Feature flags and experiments
- SQL data warehouse
- AI assistant
- Natural language dataset search
- Multimodal visualization
- VLM-assisted labeling
- Automated annotation QA
- Model evaluation
- Voxel51 Agent
| Feature | PostHog | Voxel51 |
|---|---|---|
| Best for | Open-source product analytics suite with an AI assistant | Data curation and labeling platform for visual and physical AI |
| Category | Data & analytics | Data & analytics |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | PostHog | Voxel51 |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
PostHog starts at See pricing page and Voxel51 starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 1M analytics events/month
- 5K session recordings
- 1M feature flag requests
- 1 project, 1-year retention
Pay-as-you-go
Usage-based after free tier
- Unlimited usage
- 6 projects
- 7-year data retention
- Per-product billing limits
Enterprise
Contact sales
- Annual plans and volume discounts
- Platform features and onboarding help
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
PostHog
- Many tools in one product
- Large free monthly allowance
- Transparent pricing
- Interface can feel crowded
- Usage costs grow with traffic
Voxel51
- Built on open-source FiftyOne
- Handles video, 3D and sensor data
- Air-gapped deployment available
- Team pricing is not published
- Enterprise starts at 25 seats
- Aimed at ML teams, not casual users
Which one should you choose?
Choose PostHog if you want:
- Many tools in one product
- Large free monthly allowance
- Transparent pricing
Watch out: interface can feel crowded.
Choose Voxel51 if you want:
- Built on open-source FiftyOne
- Handles video, 3D and sensor data
- Air-gapped deployment available
Watch out: team pricing is not published.
PostHog vs Voxel51 FAQ
What is the difference between PostHog and Voxel51?
PostHog: Open-source product analytics suite with an AI assistant. Voxel51: Data curation and labeling platform for visual and physical AI. Both are data & analytics tools.
Is PostHog or Voxel51 cheaper?
PostHog starts at See pricing page and Voxel51 starts at See pricing page. Check both pricing pages for current plans.
Do PostHog and Voxel51 have free plans?
PostHog: Yes. Voxel51: Yes.
Who makes PostHog?
PostHog is made by PostHog, based in United States.
Who makes Voxel51?
Voxel51 is made by Voxel51, based in United States.
Which should I choose, PostHog or Voxel51?
Choose PostHog if you value many tools in one product and large free monthly allowance. Choose Voxel51 if you value built on open-source fiftyone and handles video, 3d and sensor data.