Case Study: PersistIQ achieves sub-second response times (97% <500 ms) and 10x faster complex queries with Citus Data

With Citus, PersistIQ Can Focus on Their Application & Forget About Their Database

PersistIQ is a multi-tenant sales engagement SaaS that helps reps communicate personally at scale. Rapid growth caused their Heroku Postgres single-node database to hit limits—email and event tables ballooned, indexes no longer fit in memory, queries slowed to seconds and outages became frequent—so the team needed a horizontally scalable Postgres solution without re-architecting their Rails app.

They adopted Citus Cloud to shard Postgres, which integrated smoothly with their multi-tenant Rails setup and required only a short migration. The result: sub‑second performance for 97% of queries, up to 10x faster complex queries, dramatically more available memory and stability, and engineering time freed from database ops thanks to Citus expertise and managed service support.

PersistIQ

Cyrus Karbassiyoon

Chief Technology Officer