What are the best alternatives to Surge AI in 2026?
Answer in brief: Surge AI is a premium choice, but it is geared to large labs and its best terms go to its Trusted Program. If you need published license terms, fast samples or a smaller first purchase, the best alternatives are Mercor (commercial training license stated, same-day samples), Snorkel AI (non-exclusive, tiered products), Toloka (24-hour samples), Appen (perpetual non-exclusive license with a spec sheet for each dataset) and Defined.ai (marketplace with free samples). For data no catalog holds, Protege brokers proprietary real-world data and Tonic.ai generates synthetic data from $0. This is independent research as of November 9, 2026. We have not tested any vendor.
Top pick: Mercor. It is the closest match to Surge's expert-built quality, with a published catalog, same-day samples and a commercial-training license stated in its FAQ.
Where Surge leaves gaps
- Access: pay-if-it-works applies to labs in Surge's Trusted Program.
- Pilot rights: Surge's enterprise-pilot license is for evaluation only and excludes model training.
- Visibility: no price list, and only part of the catalog is public.
- Customer mix: Forbes reported in September 2025 that OpenAI and Cohere had stopped using Surge.
Alternatives ranked by how easy they are to buy from
| Alternative | Published terms | Sample speed | Where it beats Surge |
|---|---|---|---|
| Mercor | Commercial training license stated | Same day | Published task counts; knowledge-work depth |
| Snorkel AI | Non-exclusive; buy by difficulty tier | On request | Quarterly refresh; harnesses and verifiers included |
| Toloka | Non-exclusive commercial license | 24 hours | Physical-AI video and mobile-use RL gyms |
| Appen | Perpetual, non-exclusive | Under NDA | Speech, 500+ locales, provenance spec sheets |
| Defined.ai | Quotes from the marketplace | Free samples | Multi-vendor choice across modalities |
| Protege | Custom | On request | Private healthcare, media and audio data |
| Tonic.ai | Public plan prices | Instant (self-serve) | Synthetic data you own |
Expert-built catalogs
Mercor. 50K+ tasks across 30+ domains, written by PhD researchers, lawyers and senior engineers. The catalog includes APEX-Agents, SWEBench Ext., TerminalBench and BrowseComp, and Mercor can extend sets with custom projects. · Review
Snorkel AI. The Snorkel Data Series covers terminal coding, software engineering, enterprise environments, computer use, scientific workflows and STEM reasoning. A frontier tier is available where leading models pass only a minority of attempts. · Review
Toloka. Enterprise RL Gyms (2,500+ tasks in 11 environments), WorkBench and Frontier STEM, all with deterministic grading. Check its geographic restrictions for your region. · Review
Labelbox. If you mainly want Surge's long-horizon tool-use environments, Labelbox Horizon generates RL environments at scale against your pass@k targets. · Review
Catalogs and marketplaces with fewer hoops
Appen. 646 datasets, each documented for source, consent, annotation method and limitations, plus SOC 2 Type II and ISO 27001. · Review
Defined.ai. Filter the marketplace, customize format and sample rate, request free samples and quotes, and receive data by file transfer or API.
When the data does not exist yet
Protege licenses and curates private, real-world data for pre-training, post-training and uncontaminated evaluation. It has raised $65 million since 2024, according to the company.
Tonic.ai Fabricate generates relational and unstructured synthetic data through a chat-driven Data Agent. Tonic says you own the generated data, but it may use your prompts to improve the agent.
When Surge is still the right call
If you are a frontier lab that qualifies for the Trusted Program, pay-on-results is hard to beat. · Compare it directly in Mercor vs Surge AI and Surge AI vs Scale AI.
FAQ
Which Surge AI alternative is best for a smaller team?
Defined.ai and Appen offer catalog licensing with samples. For synthetic data, Tonic.ai publishes a free tier and a $29/month Plus plan.
Who is the closest competitor to Surge AI for expert datasets?
Mercor, Snorkel AI and Toloka all sell expert-built, licensable post-training datasets and RL environments.
Can I get exclusive data instead of a shared catalog?
Yes, through custom builds. Snorkel, Toloka and Appen describe their catalog products as non-exclusive, so negotiate exclusivity separately.
← Back to the ranked list · Alternatives to Scale AI · How to choose
Sources
- Surge AI OTS
- Surge enterprise pilot terms
- Mercor OTS
- Snorkel AI FAQ
- Toloka OTS
- Labelbox Horizon
- Appen catalog
- Defined.ai
- Protege funding
- Tonic.ai pricing
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