Skip to content
Boundstone Phone validation Format, region and line type — E.164 out Email validation Syntax, live MX, disposable and role checks IP validation Version, classification, public vs private Live HLR Real carrier, ported status and reachability — paid opt-in Bulk CSV Upload a list, get a scored file back MCP connector Give Claude the API, metered the same way SDKs Python and Node, zero dependencies Outbound sales Stop paying reps to dial dead numbers Lead-gen agencies Prove list quality before you deliver Signup fraud Catch throwaway signups at the door Email validator Syntax, MX and disposable — no signup Phone validator Format, region and line type — no signup IP validator Version and classification — no signup Signup exposure test Test your own form with real throwaways vs 1Lookup Their strengths conceded first vs Twilio Lookup Where carrier-direct scale wins vs NumVerify Where they're genuinely cheaper vs IPQualityScore Fraud platform vs focused validation Documentation Quickstart, reference, live playground Benchmarks The numbered series — № 001 frozen Methodology Frozen and checksummed before results Glossary 28 terms, each stating what we don't check Buyer's checklist 12 questions to ask any vendor, us included Blog Guides for phone, email and IP validation Changelog Everything that shipped, dated Security How it's built — and what we don't have yet Status Live uptime from a one-minute probe Pricing Start free
Product
Phone validationEmail validationIP validationLive HLRBulk CSVMCP connectorSDKs
Solutions
Outbound salesLead-gen agenciesSignup fraud
Free tools no signup
Email validatorPhone validatorIP validatorSignup exposure test
Compare
vs 1Lookupvs Twilio Lookupvs NumVerifyvs IPQualityScore
Resources
DocumentationBenchmarksMethodologyGlossaryBuyer's checklistBlogChangelogSecurityStatus
Pricing

Security

How Boundstone is built and what it holds

Written the same way the API answers: what we actually do, and — further down — what we don't have yet. If a control isn't listed here, assume we don't have it and ask.

Credentials

  • There are no passwords.Sign-in is a single-use link that expires in 15 minutes, or Google — so there is no password of yours for us to leak.
  • API keys are stored as SHA-256 hashes.The key itself is shown once, at creation, and never again. We cannot recover it for you, or for anyone claiming to be you.
  • Revocation is immediate and self-serve.From the dashboard. A revoked key fails on its next call.
  • Sessions are HttpOnly, Secure, SameSite cookies.Stored as hashes, expiring after 30 days, and you can sign out every other device from the dashboard.
  • Administrative access is compared in constant time.The check leaks neither length nor position.

Your data

  • We never see a card.Payment details go directly to Stripe's hosted checkout; no card number, expiry or CVC ever reaches our systems.
  • Export is one click.Everything we hold on your account, as JSON. It contains key metadata but never key hashes; we check this.
  • Deletion is one click, immediate and permanent.Cascading every account-scoped table. No soft-delete, no backup copy waiting to be restored.
  • Retention is scheduled, not indefinite.Per-call usage detail compacts into daily aggregates after 90 days, bulk job inputs and results are purged after 30, idempotency keys expire after 24 hours, and used sign-in tokens are swept immediately.
  • The keyless homepage demo stores only a salted hash of the IP.Never the address, never what was typed.
  • We do not sell or share your data or your queries.And we do not build datasets from what you look up.

The service itself

  • Everything runs on Cloudflare's edge network, TLS throughout.Secrets live in the platform's encrypted secret store, never in the repository.
  • The database supports 30-day point-in-time recovery.A restore point is captured before any schema change.
  • Per-key rate limits ship with standard IETF RateLimit headers.So your client can see its own budget.
  • Idempotency keys on every charged endpoint.A retried request can't double-charge you.
  • Outbound webhooks are HMAC-SHA256 signed.So you can verify they came from us. Endpoints are validated against internal addresses when registered, and a delivery that tries to redirect is refused rather than followed.
  • Abuse controls run ahead of the marketing.Disposable-domain screening, per-IP signup limits, input length caps before parsing, checkout-attempt caps, and automatic key revocation on a card-fraud signal.

Knowing when something breaks

  • A probe runs every minute.Against the worker, the database and a DNS dependency; three consecutive failures raise an alert.
  • An independent external monitor watches from outside our infrastructure.Because a health check that lives inside the thing it's checking can't report its own death.
  • Results are public on the status page.Labelled honestly as an internal probe rather than dressed up as multi-region monitoring.

What we don't have yet

Every company's security page lists what it has. Here is what we don't, because you'd otherwise have to ask — and because a company this young claiming otherwise would be the tell:

  • No SOC 2, no ISO 27001.Neither is in progress. We are a very new company and would rather say so than imply a certification we haven't earned.
  • No third-party penetration test.The code has been reviewed and hardened internally, and the money paths carry automated tests, but nobody independent has attacked it yet.
  • No formal DPA yet.Our Terms and Privacy Policy are published in draft and under legal review; a data-processing agreement lands with that review.
  • No bug bounty.There's no budget for one yet — but see below, and we will credit you.
  • No SLA.Our uptime is measured and published; it is a log, not a contractual promise. We won't sell you the promise until we can stand behind it.

Reporting something

If you find a vulnerability, email security@boundstone.io. It reaches a person, not a queue. Please give us a reasonable window to fix it before publishing, and we'll credit you unless you'd rather we didn't. We won't threaten you with lawyers for reporting a bug in good faith.

Last reviewed 2026-07-27. If something here stops being true, this page changes the same day — the same rule the rest of the site runs on.

Boundstone

Phone, email & IP validation, benchmarked in public.

Product

PricingDocsBenchmarksMethodologyBuyer's checklistChangelogStatusDashboard

Free tools

Email validatorPhone validatorIP validatorSignup exposure testGlossary

Use cases

Outbound salesLead-gen agenciesSignup fraud

Compare

vs 1Lookupvs Twilio Lookupvs NumVerifyvs IPQS

Company

AboutBlogGitHub

Legal

TermsPrivacySecurity

© 2026 Quantum Digital Plus Pty Ltd, trading as Boundstone. Melbourne, Australia.

hello@boundstone.io · GitHub · Status