Dev tools · alternatives · 2026
24 alternatives to FIPSign
Post-quantum signing API · ML-DSA-65 (NIST FIPS 204)
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
- 1
Qpher▲4Post-quantum encryption & signing — drop-in REST APIs
Jun 2026 · qpher.ai · its alternatives →
- 2
Firma.dev▲310E-signatures API for your app averaging ~3¢ per envelope
Jun 2026 · firma.dev · its alternatives →
- 3
filippo.io/mlkem768 is a pure-Go implementation of the post-quantum key exchange mechanism ML-KEM-768 optimized for correctness and readability.
2024 · words.filippo.io · its alternatives →
- 4
Sign any file with post-quantum digital signatures
Jul 2026 · majikah.solutions · its alternatives →
- 5
Skip migration and launch MCP with built-in Auth
Nov 2025 · arcade.dev · its alternatives →
- 6
Feather Auth▲184Build an entire sign-in flow in 5 minutes or less.
2020 · feather.id · its alternatives →
- 7
Signal protocol implementation for Node.js. Contribute to ForstaLabs/libsignal-node development by creating an account on GitHub.
2017 · github.com · its alternatives →
- 8
sproof sign▲80Signing made easy and safe | 100% made for Europe
2021 · sign.sproof.com · its alternatives →
- 9
- 10
Quantum-secure timestamping for verifiable digital proofs
Nov 2025 · sasasavic.ca · its alternatives →
- 11
- 12FQ
SasaSavic.ca recently launched a public cryptographic timestamping service designed to remain verifiable even in a post-quantum world. The platform uses SasaSavic Quantum Shield™, a dual-signature protocol combining classical and post-quantum security. Each submitted SHA-256 hash is: • Dual-signed with ECDSA P-256 and ML-DSA-65 (per NIST FIPS 204) • Anchored to the Bitcoin blockchain via OpenTimestamps • Recorded in a public, verifiable daily ledger API (beta, no auth required): https://sasasavic.ca/beta-api/ Example curl request: curl -X POST…
Nov 2025 · its alternatives →
- 13
kysignedfree tier, from $0.25/mo▲13E-sign documents by forwarding an email. $0.25.
Jul 2026 · kysigned.com · its alternatives →
- 14EE
Hi HN, we have recently completed a research project on how to encrypt emails with post-quantum secure algorithms as well as Forward Secrecy. We'd love to hear your feedback and discuss technical issues. The paper can be found here: https://eprint.iacr.org/2021/875
2021 · its alternatives →
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Module for generating a prefixed API Key. Contribute to seamapi/prefixed-api-key development by creating an account on GitHub.
2022 · github.com · its alternatives →
- 17
JioSign▲70Most convenient, fastest and secure digital signing solution
2022 · jiosign.com · its alternatives →
- 18
Post - Quantum Blockchain (ML-DSA-65)
Jul 2026 · quantum-lattice.futuristicai.co.za · its alternatives →
- 19
Get free email forwarding for custom domains. Send & receive as [email protected] with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.
2023 · forwardemail.net · its alternatives →
- 20
Neptune is a quantum-safe layer 1 blockchain combining zk-STARKs and PoW consensus. Private by default, programmable, and built for global scale
2014 · neptune.io · its alternatives →
- 21
- 22
Go Quantum-Safe Before Quantum Goes Live
2025 · qu-secure.net · its alternatives →
- 23
This is an educational reference implementation showing how to build reasonably secure, standards-compliant authentication from first principles on Cloudflare Workers. Stack: Hono, Turso (libSQL), PBKDF2-SHA384 + normalization + common-password checks, JWT access + refresh tokens with revocation support, HTTP-only SameSite cookies, device tracking. It's deliberately minimal — no OAuth, no passkeys, no magic links, no rate limiting — because the goal is clarity and auditability. I wrote it mainly to deeply understand edge-runtime auth constraints and to have a clean Apache-2.0 example that…
Feb 2026 · github.com · its alternatives →
- 24
Hey HN! Victor here from SignatureAPI (https://signatureapi.com) SignatureAPI is an electronic signature platform via API. Our customers use SignatureAPI to add electronic signatures to their apps and workflows. SignatureAPI was born out of the frustration of a friend of mine who needed to integrate electronic signatures into his app, but found Docusign API, at $1+ per envelope, too expensive for his use case. We quickly realized that many others shared this same frustration. We are different from other platforms such as Docusign, Dropbox Sign, Adobe Sign, etc in two key ways: 1.…
2024 · signatureapi.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →