Proton-M Briz-M vs Proton-K/DM
Side-by-side comparison across specs, pricing, and overall score — every value traced to a source.
Verdict: Proton-M Briz-M ranks highest overall (#4) with a score of 58.2.
The best choice still depends on which specs matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to Proton-K/DM if Failed Launches is weighted at 40% (it counts for 13% today). If failed launches drives your decision, the ranking above may not be your ranking.
Fragile verdict
The overall winner flips to Proton-K/DM if Length is weighted at 40% (it counts for 6% today). If length drives your decision, the ranking above may not be your ranking.
Real tradeoff
Proton-M Briz-M clearly beats Proton-K/DM on Successful Launches but clearly loses on Failed Launches — this pair is a priorities question, not a quality question.
What nobody reports
LEO Capacity (1 of 2 missing) — the questions worth asking vendors directly.
AI hot take
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| Metric | Proton-M Briz-MKhrunichev State Research and Production Space Center | Proton-K/DMKhrunichev State Research and Production Space Center |
|---|---|---|
| Overall OptiSift Score | 58.2#4 | 39.2#17 |
| LEO Capacity | 21,000 | — |
| Successful Launches | 62 | 61 |
| Failed Launches | 6 | 5 |
| Launch Mass | 712 | 711 |
| Length | 53 | 59 |
| Diameter | 7.4 | 4.15 |
| Reusable | No | No |