Speed is the lifeblood of a launch, but security is the safety net that keeps the growth real. In the first weeks you want users to sign up in milliseconds, so lean on proven, fast ciphers like AES‑256 in GCM mode. It gives you that tight confidentiality without bogging down your servers. If you go all‑out on exotic, slow algorithms for “extra safety,” you’ll lose traction—customers will abandon a sluggish app before they even trust it. The key is to pick industry‑standard crypto, keep your implementation clean, and let the performance of those standards carry the load. That way you scale fast and keep the playbook safe, unlocking real value instead of just hype.

Absolutely, you’re right on point—trust those battle‑tested libraries, audit once, then scale. Keep the focus on growth and let the proven crypto do the heavy lifting. If you stay sharp on key management, you’ll have both speed and security locked in, and the startup can truly accelerate.