FerretDB (MongoDB-compatible)

Document Available Free tier Point-in-time recovery

MongoDB-compatible, built on PostgreSQL

FerretDB speaks the MongoDB wire protocol and stores your documents in PostgreSQL with the DocumentDB extension. Use mongosh and your MongoDB drivers, with Postgres-grade backups underneath.

Document apps on an open licence
Leaving Atlas
JSON-first prototypes

Create FerretDB Pricing Docs

mongosh · ferret-7f3k.us-east.databasezy.com

Sample

app> db.orders.find(
       { status: "shipped", total: { $gt: 100 } },
       { _id: 0, number: 1, total: 1, country: 1 }
     ).sort({ total: -1 }).limit(3)

Sample result of the FerretDB (MongoDB-compatible) query above
number	total	country
A-10492	842.5	DE
A-10388	610	US
A-10511	455.9	NL

3 rows · 7.4 ms Illustrative data and timing

Features

FerretDB on Databasezy

MongoDB drivers work

Connect with mongosh, Mongoose or any official MongoDB driver over TLS.
PostgreSQL underneath

Documents live in a CloudNativePG cluster with the DocumentDB extension.
Point-in-time recovery

Backups and point-in-time recovery come from the backing PostgreSQL, not from MongoDB tooling.
Apache 2.0

Fully open source, so there is no licence question about running it as a service.

Quick start

Connect to FerretDB

Hosts, ports and the CA bundle come from the portal or the CLI after you create an instance. Credentials are shown once and never stored by our control plane.

From the CLI

1. Create the instance

zb instances create --engine ferretdb --name ferretdb-7f3k --wait

2. Download the CA bundle

zb ca > databasezy-ca.pem

3. Open a shell with a one-time credential

zb connect ferretdb-7f3k

At a glance

Category: Document
Versions: 2.7, 2.4
Wire protocol: mongodb · port 27017
Runtime: Single-node adapter (ghcr.io/ferretdb/ferretdb)
Backing store: postgres-documentdb
Backup: barman-cloud base backups + continuous WAL archiving to object storage · point-in-time recovery
Pause: Scale to zero
Free tier: Yes
Licence: Apache-2.0

Connection strings and drivers

Connection URI

mongodb://app:<password>@ferret-7f3k.us-east.databasezy.com:27017/app?tls=true&tlsCAFile=databasezy-ca.pem&authSource=admin

mongosh

mongosh "mongodb://ferret-7f3k.us-east.databasezy.com:27017/app?tls=true&authSource=admin" --username app

Node.js (mongodb)

import { MongoClient } from "mongodb";

const client = new MongoClient(process.env.MONGODB_URI);
const orders = client.db("app").collection("orders");
console.log(await orders.countDocuments());

Deployment

Choose where it runs

Placement is chosen per database, so a regulated workload and a side project can live in the same organisation.

Standard hosting

Shared cells with namespace isolation, default-deny network policy and an IP allow-list. Available from the free plan up.
- Usage-based compute, billed per running hour
- Spend cap to stop surprises
Secure hosting (HIPAA)

This database runs on dedicated nodes in a separate HIPAA cell, under a signed Business Associate Agreement. Available on Team and Enterprise.
- $0.10 per instance-hour on top of compute
- How secure hosting works
From the CLI or API

Script instances in CI with the zb CLI or the REST API. Pick the placement per instance.
secure placement
```
zb instances create --engine ferretdb --placement secure --wait
```

Plans

FerretDB on each plan

Usage-based pricing with a spend cap: you pay a plan fee plus what your instances use.

Free tier

Yes. One f0 instance with a shared vCPU (bursts to 1), 512 MiB of memory and a 500 MB database, no card required. It sleeps after 15 minutes idle and wakes on connect.

Sizes

From s0 (0.25 vCPU, 1 GiB) at $10/mo up to xl32 (32 vCPU, 128 GiB). Resize without changing the connection string.

All sizes and prices

Backups

barman-cloud base backups + continuous WAL archiving to object storage. Point-in-time recovery is an add-on on Solo and Team and Enterprise ($100 per instance per month for each 7 days of retention) and included on Enterprise.

Migrate

Migrate to FerretDB from

Copy a database in with a connection string, a file upload or the CLI. Preflight checks the source first and verification compares the copy.

Documentation

FerretDB docs

FerretDB questions

Which FerretDB versions can I run?

2.7, 2.4. New instances default to 2.7; pick another with --engine-version or in the portal. Minor and patch updates are applied in your maintenance window after a pre-change backup.

Which extensions, modules or plugins are available?

FerretDB implements the commonly used MongoDB commands and aggregation stages, not all of them. Atlas-only features such as Atlas Search and triggers are not available. Migration preflight flags anything your source uses that FerretDB does not support.

How are backups handled?

Backups use barman-cloud base backups + continuous WAL archiving to object storage. Paid plans run scheduled backups (Solo: daily, 7-day retention; Team: daily, 14-day retention); the free plan keeps one manual snapshot. Point-in-time recovery is available as an add-on on Solo and Team and Enterprise and included on Enterprise. Restores go into a new instance, so the original stays untouched.

Is the connection encrypted?

Always. The gateway terminates TLS (1.3 where your client supports it, 1.2 at minimum) and re-encrypts traffic to the database. Plain-text connections are refused. Verify the server with our CA bundle from the portal or zb ca, and restrict access further with the IP allow-list included on every plan.

Can I pause it when I'm not using it?

Yes. Free instances sleep after 15 minutes without connections and wake on the next one; after 7 idle days they are archived with the disk kept. On paid plans you pause on demand or on a schedule. A paused instance bills storage and backups but no compute, and wakes in 10 to 40 seconds.

What are the limits?

The free plan runs one f0 instance with a shared vCPU (bursts to 1), 512 MiB of memory, 20 connections and a 500 MB database. Paid sizes run from s0 (0.25 vCPU, 1 GiB, 60 connections, $10/mo) to xl32 (32 vCPU, 128 GiB, 5,000 connections), with up to 16 TB of disk.

FerretDB or MongoDB?

Choose FerretDB for an open-source licence, the free tier and PostgreSQL-based backups. Choose MongoDB (Percona Server) when you need full server compatibility, such as change streams or less common aggregation stages.

What you get on each plan

Plan features as they apply to FerretDB (MongoDB-compatible).

FerretDB (MongoDB-compatible) features by plan
Feature	Free	Solo	Team	Enterprise
FerretDB on this plan	Yes	Yes	Yes	Yes
Plan fee	$0/mo	$25/mo	$599/mo	Custom
Largest size	f0	xl32	xl32	xl32
Included per instance	500 MB	8 GB	8 GB	Negotiated
Max disk per instance	1 GB	1 TB	16 TB	16 TB
Scheduled backups	1 manual snapshot	Daily, 7-day retention	Daily, 14-day retention	Hourly, 35-day retention · cross-region copy · immutable
Point-in-time recovery	—	Add-on	Add-on	35 days included
Pause	Sleeps after 15 min idle, wakes on connect	On demand or on a schedule	On demand or on a schedule	On demand or on a schedule
Secure hosting (HIPAA)	—	—	Available with a BAA	Available with a BAA
Support	Community	Email	Priority	24x7 dedicated
Uptime SLA	—	—	99.9%	99.95%

Start with FerretDB today

The free plan needs no card. Upgrade when you need more, and keep the same endpoint.

Create FerretDB See pricing

FerretDB (MongoDB-compatible)

Good for

Sample query

FerretDB on Databasezy

MongoDB drivers work

PostgreSQL underneath

Point-in-time recovery

Apache 2.0