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Grimlock: E2EE Cross Platform OpenSource
E2EE library for byte-to-byte parity across Go, TS and Py
When building a E2EE LLM Chat App, we encountered this problem. We couldn't find any good open-source library which did this and was is sync across platforms. So, we built it with a cross-compatibility testing suite.
Hey PH!
Builder of Grimlock here.
We built this after running into a painful problem at Privyy.io, our Go backend and TypeScript frontend needed to share encrypted data, but every crypto library is language-specific. That meant either duplicating logic with subtle incompatibilities or trusting a black box.
Grimlock solves this with identical cryptographic implementations in both Go and TypeScript, with a cross-compatibility test suite that verifies Go-encrypted data decrypts correctly in TS and vice versa and back again.
Under the hood:
X25519 ECDH + AES-256-GCM for messages, Argon2id for passcode-derived keys, HKDF-SHA512 for recovery keys.
All with a versioned protocol so you can evolve without breaking existing encrypted data.
Happy to answer questions about the cryptographic design, the cross-lang testing approach, or why we chose these primitives.
Would love your feedback! 🔐
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About Grimlock: E2EE Cross Platform OpenSource on Product Hunt
“E2EE library for byte-to-byte parity across Go, TS and Py”
Grimlock: E2EE Cross Platform OpenSource was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #83 on the daily leaderboard. When building a E2EE LLM Chat App, we encountered this problem. We couldn't find any good open-source library which did this and was is sync across platforms. So, we built it with a cross-compatibility testing suite.
Grimlock: E2EE Cross Platform OpenSource was featured in Open Source (68.4k followers), GitHub (41.2k followers) and SDK (746 followers) on Product Hunt. Together, these topics include over 31.8k products, making this a competitive space to launch in.
Who hunted Grimlock: E2EE Cross Platform OpenSource?
Grimlock: E2EE Cross Platform OpenSource was hunted by Sidhartha Mallick. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Sidhartha Mallick