Data anchoring and timestamping · Comparison
Bernstein vs KAS Anchor API vs OriginStamp
3 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 | Bernstein | KAS Anchor API | OriginStamp |
|---|---|---|---|
| What you're paying for | Compliance includedCourt-oriented proof of authorship for IP files: Bitcoin anchoring plus EU qualified timestamps, without the vendor seeing your files. | 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 | 3.7 | 1.5 | 3.8Best |
| Free option | Paid only | –Not measured | –Not measured |
| Card to start | –Not measured | –Not measured | –Not measured |
| Getting access | Self-serve | Sales call required | Sales call required |
| Starter priceCheapest paid plan | $54/mo | –Not measured | –Not measured |
| Pricing model | Tiered | Custom quote | Custom quote |
| Pricing page | Public prices | Prices hidden | Prices hidden |
| What it anchors to | Bitcoin, plus EU and China timestamp authorities | Kaia mainnet (one transaction per payload) | Bitcoin and Ethereum (Merkle root per batch) |
| Billing unit | Registration credit (one project version, up to 99 files) | Pay as you go by anchoring cycle and usage, by contact | Offer based on timestamps and proofs |
| Free option | None; certificate validation is free | Not stated for the Anchor API | Free web tool for single proofs; test API key on request |
| Reference scenario (100,000 hashes/mo) | Not offered (no API) | Priced by sales | Priced by sales |
| Proof you keep | PDF certificate | Transaction hash per payload | Downloadable certificate or raw proof |
| Verify without the vendor | Manual steps documented; browser validator | Not described | Manual steps documented |
| Only the hash leaves your systems | No; files uploaded encrypted | Yes, you choose the payload | Yes |
| Qualified timestamps (eIDAS) | EU qualified on Scale and Enterprise | No | eIDAS compatibility on request |
| SOC 2 / ISO 27001 | Not stated | Not stated | Not stated |
| API and webhooks | None | REST API and caver SDK extensions; no webhooks | REST API, batch hashes, webhooks |
| SSO | Enterprise plan, one-time setup fee | Not listed | Not listed |
| Bottom line | From its public pages, Bernstein is the most legally oriented option here, with EU qualified timestamps on a self-serve plan. It is a web app for IP files, not an anchoring API, from $54 a month. | 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: Bernstein: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; 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 Bernstein review
Checked Oct 15, 2026- Pick Bernstein when
- You certify IP files by hand and want EU qualified timestamps and published plans.
- Pick OriginStamp when
- You need an API to anchor hashes from logs or systems, on Bitcoin and Ethereum.
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.
From our OriginStamp review
Checked Oct 15, 2026- Pick OriginStamp when
- You need an API and webhooks to anchor hashes from your own systems.
- Pick Bernstein when
- You want a web app with published plans, PDF certificates and EU qualified timestamps for IP files.
Entry price
Baseline: each product's cheapest paid plan, per month. Included usage differs, so read the line under each price.
- BernsteinLowest priceStarter$54/mo1 credit a month; $540 a year (2 months free); extra credits from $39
- Up to 99 files and 10 GB per project
- Credits roll over for 3 months
- Secure sharing
- No SSO
- 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: Bernstein 2026-10-15, KAS Anchor API 2026-10-15, OriginStamp 2026-10-15.
Which one fits
- If you need to start today without a sales call
- BernsteinSelf-serve sign-up; the only one here you can use right after signing up.
- Lowest starter price
- Bernstein$54/mo for the Starter plan. 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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