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Queen MQ
A message queue that turns Postgres into Kafka + RabbitMQ
Open-source message queue on PostgreSQL with per-entity FIFO ordering at any cardinality, transactional enqueue inside a PG transaction, replay-from-timestamp, dead-letter queue, JWT auth, Vue 3 dashboard. Five SDKs (JS, Python, Go, PHP, C++). Apache 2.0. One Docker container.
Hi PH! 👋
I'm Alice from Smartness, and we're launching Queen MQ today after running it in production for 7 months.
The short version: Queen MQ is an open-source message queue that runs on PostgreSQL and gives you unlimited ordered partitions per queue: per chat, per user, per workflow, per whatever, without preallocating anything. One Docker container, plus the Postgres you already have.
Why we built it.
We run Smartchat, an AI guest-messaging platform with 100 000+ concurrent chat conversations. Each chat needs strict FIFO ordering across translate, retrieve, reply steps. We tried Kafka with 32, then 1 000 partitions; one slow conversation kept blocking 3 000 others sharing the same hash bucket. We tried RabbitMQ at one queue per chat; couldn't sustain 100k queues. pg-boss and pgmq are libraries, not brokers.
So we built Queen and ran billion messages through the benchmark suite with zero loss.
What you get out of the box:
• Per-entity FIFO ordering at any cardinality (10 to 100 000+ partitions, no preallocation)
• Atomic enqueue inside a PG transaction (transactional outbox built in)
• Consumer groups with replay from any timestamp
• Lease-based delivery, retries, DLQ
• Five SDKs: JavaScript, Python, Go, PHP / Laravel, C++
• Vue 3 dashboard, Prometheus metrics, JWT auth
• One stateless C++ binary + your Postgres
Try it in 30 seconds:
docker network create queen
docker run --name qpg --network queen -e POSTGRES_PASSWORD=postgres -p 5433:5432 -d postgres
docker run -p 6632:6632 --network queen -e PG_HOST=qpg -e PG_PASSWORD=postgres smartnessai/queen-mq:latest
And go to localhost:6632
About Queen MQ on Product Hunt
“A message queue that turns Postgres into Kafka + RabbitMQ”
Queen MQ was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #81 on the daily leaderboard. Open-source message queue on PostgreSQL with per-entity FIFO ordering at any cardinality, transactional enqueue inside a PG transaction, replay-from-timestamp, dead-letter queue, JWT auth, Vue 3 dashboard. Five SDKs (JS, Python, Go, PHP, C++). Apache 2.0. One Docker container.
On the analytics side, Queen MQ competes within Open Source, GitHub, Tech and Database — topics that collectively have 735.3k followers on Product Hunt. The dashboard above tracks how Queen MQ performed against the three products that launched closest to it on the same day.
Who hunted Queen MQ?
Queen MQ was hunted by Alice Viola Setti. 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.
For a complete overview of Queen MQ including community comment highlights and product details, visit the product overview.
Alice Viola Setti