What are the best alternatives to Scale AI in 2026?
Answer in brief: The best Scale AI alternative depends on the job. For LLM post-training, choose Surge AI (runner-up: Mercor). For computer vision, choose Sama (runner-up: iMerit). For speech, choose Appen (runner-up: TELUS Digital). For enterprise fine-tuning, choose Snorkel AI. On a tight budget, choose Prolific (runner-up: Toloka). Scale covers more ground than any one of these vendors, but each specialist goes deeper in its own area. This is independent research based on vendors' own pages and on AP reporting. We did not test any service.
Top Scale AI alternative: Surge AI. If you are leaving Scale for frontier post-training work, Surge is our pick. It sells RLHF, SFT, rubrics, verifiers and RL environments, publishes training gains for its off-the-shelf datasets, and reports no outside investor. Visit Surge AI →
Why buyers look beyond Scale
- Ownership. Meta invested $14.3 billion for a 49% stake in June 2025 (AP). Scale says Meta gets no access to customers' confidential information. Some labs that compete with Meta still prefer a vendor with no stake from a rival.
- Strategy shift. In January 2026 Scale said its applications revenue more than doubled in the second half of 2025, and it is now putting more weight on enterprise and government applications. Its data business remains profitable.
- Specialist depth. A specialist in one modality can beat a generalist on that modality.
The best alternative for each use case
| Use case | Best alternative | Runner-up | Why it beats a generalist |
|---|---|---|---|
| LLM post-training | Surge AI | Mercor | Post-training is its whole business; it publishes gains |
| Computer vision | Sama | iMerit | 99% first-batch acceptance claim; 8-year average customer tenure |
| Speech | Appen | TELUS Digital | ASR, TTS and medical speech in 500+ locales |
| Enterprise fine-tuning | Snorkel AI | (Scale AI holds this runner-up spot) | Data development, fine-tuning and evaluation in one platform |
| Budget | Prolific | Toloka | Published fees; no minimums |
The alternatives in brief
- Surge AI covers RL environments, verifiers, RLHF, SFT and human evaluation in 70+ languages. Visit Surge AI →
- Mercor says it has 5M+ experts and builds benchmarks with Harvey, Cognition and Sierra. Visit Mercor →
- Snorkel AI pairs Snorkel Flow (labeling, RAG optimization, fine-tuning, evaluation) with expert data-as-a-service. Visit Snorkel AI →
- Turing offers coding traces, RL environments and a 5M+ expert pool, and names Gemini, Anthropic and NVIDIA among the labs it supports. Visit Turing →
- Labelbox pairs its Horizon RL environments with the Alignerr network (2.6M+ experts, company claim). Visit Labelbox →
- Invisible Technologies says it has trained models for more than 80% of leading AI providers and works in 80+ languages. Visit Invisible →
- Sama covers production image, video and point-cloud labeling. Visit Sama →
- iMerit covers sensor fusion and medical imaging on Ango Hub. Visit iMerit →
- Appen covers speech and licensed audio datasets. Visit Appen →
- TELUS Digital brings a 1M+ contributor community and 500+ languages and dialects. Visit TELUS Digital →
- Prolific and Toloka are the self-serve options for small budgets. Visit Prolific → · Visit Toloka →
When to stay with Scale AI
Stay with Scale if you need one vendor for LLM data, robotics (Scale reported more than 150,000 hours of physical-AI data), automotive and defense work, or an enterprise evaluation-to-fine-tuning loop. For robotics-only buying, see Best robotics data companies.
Pricing model
Scale and most alternatives quote custom work. The exceptions are Prolific, with a published fee of 42.857% for corporate customers, and Toloka, with usage-based self-serve pricing. See our pricing comparison.
FAQ
What is the best alternative to Scale AI?
For LLM post-training, Surge AI. For computer vision, Sama. For speech, Appen. For enterprise fine-tuning, Snorkel AI. For a tight budget, Prolific.
Why are companies switching from Scale AI?
Some buyers want a vendor with no stake from Meta, which invested $14.3 billion for 49% in 2025. Others want a specialist that goes deeper in one modality.
Is there a cheaper alternative to Scale AI?
Yes. Prolific publishes its fees and has no minimum commitment, and Toloka offers usage-based self-serve pricing with no minimums or contracts.
Keep comparing
Surge AI vs Scale AI · Mercor vs Scale AI · Scale AI review · Surge AI review · Snorkel AI review · Full ranked list of training data companies