Data anchoring and timestamping · Comparison
KAS Anchor API vs OriginStamp
2 products compared side by side: what you pay for with each one first, then the five access facts, entry prices, recorded plan limits and the bottom line of each review. The evidence note under the table says how each product was checked.
Side by side
| Metric | KAS Anchor API | OriginStamp |
|---|---|---|
| What you're paying for | Saves engineering timeAnchor private-chain block hashes or other data to the Kaia public chain through a managed API, without running a Kaia node. | Saves engineering timeAnchor your hashes to Bitcoin and Ethereum through one REST call, without running wallets, nodes or Merkle batching yourself. |
| Overall score | 1.5 | 3.8Best |
| Free option | –Not measured | –Not measured |
| Card to start | –Not measured | –Not measured |
| Getting access | Sales call required | Sales call required |
| Starter priceCheapest paid plan | –Not measured | –Not measured |
| Pricing model | Custom quote | Custom quote |
| Pricing page | Prices hidden | Prices hidden |
| What it anchors to | Kaia mainnet (one transaction per payload) | Bitcoin and Ethereum (Merkle root per batch) |
| Billing unit | Pay as you go by anchoring cycle and usage, by contact | Offer based on timestamps and proofs |
| Free option | Not stated for the Anchor API | Free web tool for single proofs; test API key on request |
| Reference scenario (100,000 hashes/mo) | Priced by sales | Priced by sales |
| Proof you keep | Transaction hash per payload | Downloadable certificate or raw proof |
| Verify without the vendor | Not described | Manual steps documented |
| Only the hash leaves your systems | Yes, you choose the payload | Yes |
| Qualified timestamps (eIDAS) | No | eIDAS compatibility on request |
| SOC 2 / ISO 27001 | Not stated | Not stated |
| API and webhooks | REST API and caver SDK extensions; no webhooks | REST API, batch hashes, webhooks |
| SSO | Not listed | Not listed |
| Bottom line | From its public pages, the KAS Anchor API is a managed route to anchor payloads on Kaia, now run by AhnLab Blockchain Company. Price, proofs and verification guidance are not on the pages. | From its public pages, OriginStamp is a long-running anchoring API with two chains, batching and webhooks. The price is an offer, and a few docs pages describe an older anchoring method. |
Evidence: KAS Anchor API: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; OriginStamp: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run. Prices in USD as listed, excluding tax. "–" means not recorded.
When to pick each
In the words of each review, with the date its facts were checked.
From our KAS Anchor API review
Checked Oct 15, 2026- Pick KAS Anchor API when
- Your anchors belong on Kaia and your billing should run through a Korean operator.
- Pick OriginStamp when
- You want Merkle batching, proof files and anchors on Bitcoin and Ethereum.
Entry price
Baseline: each product's cheapest paid plan, per month. Included usage differs, so read the line under each price.
- KAS Anchor APIKAS API Starter$300/moGeneral KAS API plan: 100,000 requests a day
- Ticket-based support
- Overuse billed at the plan rate per request × 120%
- OriginStampTimestamping APIContact salesPrice depends on the number of timestamps and proofs
- Free test API key on request
- Several SHA-256 hashes per request
- Webhooks for tree and proof events
- Development API server
Prices as listed on each pricing page, in USD per month, excluding tax. Observed: KAS Anchor API 2026-10-15, OriginStamp 2026-10-15.
Which one fits
- If you need to start today without a sales call
- NoneNone of these is self-serve: KAS Anchor API (Sales call required) and OriginStamp (Sales call required).
- Lowest starter price
- KAS Anchor API$300/mo. OriginStamp lists no comparable paid price.
- Highest overall score
- OriginStamp3.8/10 (Fair). The review shows the score breakdown and the run behind it.
Picked by fixed rules from the table above, not by hand. How we score
Full reviews
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