kitio.aiAppen vs Sieve
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Appen starts at See pricing page and Sieve 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
- Custom data collection
- RLHF and red teaming
- Speech and multimodal annotation
- LiDAR and robotics labeling
- Off-the-shelf datasets
- AI Data Platform (ADAP)
- Curated video datasets
- Editing pairs
- Audio-visual data
- Dense annotation and QA
- Computer-use environments
| Feature | Appen | Sieve |
|---|---|---|
| Best for | Human-annotated training data and model evaluation for AI teams | Curated video, audio and image datasets for AI labs |
| Category | Data & analytics | Data & analytics |
| Pricing model | Paid | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No | No |
| Made by | Appen | Sieve |
| Based in | Australia | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Appen starts at See pricing page and Sieve starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Appen
- Covers text, speech, vision and code data
- Coverage in over 500 locales
- SOC 2 and ISO 27001 certified
- Project-based pricing via sales
- Service-heavy rather than self-serve
- Mainly for larger AI teams
Sieve
- Covers video, audio, image and interaction data
- Filters for rights and quality
- Custom datasets delivered on an SLA
- No public pricing
- Sales-led purchasing
- Not a tool for individual developers
Which one should you choose?
Choose Appen if you want:
- Covers text, speech, vision and code data
- Coverage in over 500 locales
- SOC 2 and ISO 27001 certified
Watch out: project-based pricing via sales.
Choose Sieve if you want:
- Covers video, audio, image and interaction data
- Filters for rights and quality
- Custom datasets delivered on an SLA
Watch out: no public pricing.
Appen vs Sieve FAQ
What is the difference between Appen and Sieve?
Appen: Human-annotated training data and model evaluation for AI teams. Sieve: Curated video, audio and image datasets for AI labs. Both are data & analytics tools.
Is Appen or Sieve cheaper?
Appen starts at See pricing page and Sieve starts at See pricing page. Check both pricing pages for current plans.
Do Appen and Sieve have free plans?
Appen: No. Sieve: No.
Who makes Appen?
Appen is made by Appen, based in Australia.
Who makes Sieve?
Sieve is made by Sieve.
Which should I choose, Appen or Sieve?
Choose Appen if you value covers text, speech, vision and code data and coverage in over 500 locales. Choose Sieve if you value covers video, audio, image and interaction data and filters for rights and quality.