kolm vs OpenPipe.
OpenPipe is a strong hosted DPO/SFT product. The differences below are not about quality of training - they are about what you get back at the end. A signed artifact you own, with a receipt chain auditors can read, runs everywhere your hardware does.
Ten axes. Reviewed 2026-05-15.
| Axis | kolm | OpenPipe | Why it matters | Proof |
|---|---|---|---|---|
| Output you get | signed .kolm file on disk | hosted endpoint URL | A file on disk is forever; an endpoint can be deprecated or repriced. | anatomy → |
| Runs offline | yes | no | Air-gap, regulated zones, edge devices, transient connectivity. | /airgap → |
| Receipt chain | HMAC-SHA256 per inference, examinable | none | Auditors want to verify what the model saw, what it returned, and that the bundle wasn't tampered with. | receipt JSON → |
| Pricing model | flat compile + free local run | per-token serving forever | After compile you pay $0 to serve at any scale. | ROI calculator → |
| Algorithms | DPO, KTO, ORPO, SimPO, IPO, GRPO, online-DPO, distillation, MoE-LoRA, reward modeling, federated, RAFT, RLHF (42 SOTA total) | DPO, SFT, some KTO | More alignment recipes = better fit per task. Verifiable rewards (GRPO) is a different shape from preference optimization (DPO). | /research → |
| Multi-tenant adapter serving | CID-keyed adapter pool (S-LoRA pattern) | single model per endpoint | 14000GB vs 94GB GPU for 1000 distinct tasks. | paper → |
| K-score quality gate | 0.40·A + 0.15·S + 0.15·L + 0.15·C + 0.15·V, compile-time blocking | accuracy metric in dashboard | A blocking gate is a contract. A dashboard is a suggestion. | K-score formal → |
| Reference open spec | RS-1 (.kolm format, public spec) | proprietary | An independent verifier can be built. The format is not lock-in. | /spec → |
| Compliance packs | HIPAA, SR 11-7, SOX-lite, BAA-bound | SOC 2 Type 2 | Industry-specific is what a vertical buyer's procurement asks for. | /compliance-packs → |
| SDKs | Python + TypeScript, plus CLI | Python only | Front-end and edge teams ship in TS. | /sdks → |
When OpenPipe is the right answer.
If you are building a SaaS where every inference must be billable per call, you want a hosted endpoint not a file. OpenPipe is a clean implementation of that shape. We are different because we sell the file, not the call.
When kolm is the right answer.
You have a task that is stable enough to compile, you serve at volume, or you operate in an environment where a hosted endpoint is a procurement problem. The signed file with a receipt chain is what your auditors and your CFO both want.