POST
/drawsFreeze pool size, weighting, and deduplication before the campaign goes live.
EARLY ACCESS
LIMITEDLaunch offer available while the first 400 slots last
Run verifiable draws
with a proof trail.
Freeze the rules, publish a proof URL, and let anyone verify the outcome.
// entropy bytes
0000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000
// stream closed — trailers
←X-Ledger-Hash: sha256:4298fc1c149afb…
X-Ledger-Seq: 18432
EARLY ACCESS OFFER
Free for 3 months
then £69.99/mo £99
First 400 teams lock this in. All four segments included in every plan.
✓150 draws / month · 50,000 entrants per draw
✓50 winners per draw
✓Permanent proof URLs
✓5 scheduled draws · full round history
✓Multi-phase campaigns
✓Embeddable proof widget
Start with draws. Expand from there.
Use published draw proofs first, then add ledger-backed streams or lower-level entropy endpoints where the workflow needs more than winner verification.
1
<20msp99 latency, stateless endpoints
Fast stateless RNG
The stateless endpoints (/rng, /prng, formats) are purely ephemeral — no ledger, no overhead. Entropy is returned directly in the response, up to 8 MiB.
GET /rng?bytes=32&format=hex2
?ledger=trueopt-in on any stream request
Ledger-backed streaming
Add ?ledger=true to any stream. The session is hash-chained to a public ledger. HTTP trailers return X-Ledger-Hash — permanently verifiable by anyone.
X-Ledger-Hash: sha256:e3b0…3
proof_urlper published draw or game round
Published draw proofs
Fair draws and game rounds can be explicitly published. Each publish mints a proof_token with a public_url and embed_url — share it, it never expires.
POST /draws/:id/publishWHY DRAW TEAMS SWITCH
More than "trust us" winner selection.
Most draw tools stop at producing a winner. SOPH is designed for teams that need both the outcome and the evidence: fast entropy underneath, frozen draw configuration, publish-on-demand proof URLs, and ledger-backed history when a result may later be challenged. Gaming, simulation, and security workflows fit underneath the same platform, but verifiable draws are the clearest first use case.
Evidence when a draw is challenged
Typical services give you a winner and little else. SOPH keeps the fast path lean, then adds publication and verification only on the selections that need outside trust.
Built for campaign workflows, not just bytes
Beyond raw entropy, the platform is designed for winner selection, round history, proof publishing, and reviewable records so teams do less glue work around a basic RNG API.
Continuously tested in public
Established batteries and supporting analysis run continuously against live output, with logs and charts published on the live proofs page.
Start with draws. Expand into other trust workflows.
Fair draws are the clearest launch wedge, but the same platform also maps to gaming, simulation, and security once you need more than a single published winner proof.
Fair Draws
Frozen rules, recorded rounds, proof published on demand.
Freeze the draw config before it runs. Execute against that frozen state. Publish the proof URL only when you choose — not automatically.
What this gives you
✓Config hash locked before selection starts
✓Round history for multi-phase campaigns
✓Publish is a separate, explicit action
Endpoints
GET
/draws/:idRead the current draw state, config hash, execution status, and latest proof token.
POST
/draws/:id/selectRun winner selection against the frozen rules and write the round record atomically.
GET
/draws/:id/historyInspect every stored round for multi-phase giveaways, reruns, and agency audit work.
GET
/draws/:id/proofReturn the full proof package with config hash, entropy hash, winners, and verification chain.
POST
/draws/:id/publishPush the selected result public and mint the shareable proof URL.
Production-ready from day one.
50+ MB/s
streaming throughput
1,000 req/s
Scale tier, stateless
< 20ms
p99 latency
100%
NIST pass rate
Streaming endpoints run on dedicated infrastructure. Stateless RNG stays on the fast path with zero overhead.
Independently validated randomness
If you run promotions, raffles, or audit-sensitive selections, join now and we'll confirm your launch tier by email.
Join the waitlist →Join the list.
Run draws people can verify.
Launch offer capacity is limited. Join the waitlist and we will confirm your access tier by email.
Frozen rules before selectionProof URLs for published winnersLedger-backed history when needed