3 Best Open-Source Alternatives to Convex in 2026
By Noahlast updated pricing verified
Compared: open-source alternatives to Convex
| Alternative | Best for | Standout | Biggest weakness | Learning curve | Price |
|---|---|---|---|---|---|
| Convexreference | developers and small teams building AI agents or real-time web apps who want a database, functions, and search layer in one TypeScript-native system instead of assembling separate services | Reactive queries with automatic real-time sync and full ACID transactions, combined with end-to-end TypeScript type safety between the database schema and application code. | Business/Enterprise pricing starts at a $2,500/month minimum, a steep jump from the $25/developer Professional plan, and functions are written against Convex's own TypeScript API rather than standard SQL, raising migration cost if a team later needs to move off it. | Moderate | Free tier · paid from $25/mo |
| Supabase | developers who want a Postgres-based backend (auth, storage, realtime, auto-generated APIs) they can self-host later, rather than committing to a proprietary NoSQL platform like Firebase | Auto-generated REST, GraphQL, and Realtime APIs derived straight from a project's Postgres schema, with Row Level Security enforcing per-row authorization at the database layer instead of in application code. | Pricing beyond the $25/month Pro base is usage-based and billed per project rather than per account, so teams running multiple projects or exceeding the 100,000 MAU / 250GB egress limits can see invoices climb well past the advertised starting price. | Moderate | Free tier · paid from $25/mo |
| PocketBase | developers who want a single-binary backend (database, auth, storage, realtime API) for a side project or small-to-medium app without assembling separate services | The entire backend — SQLite database, authentication, file storage, and a realtime REST API — ships as one portable executable with no separate services to provision. | There is no official managed cloud hosting, so scaling, backups, and uptime are entirely the developer's responsibility, and SQLite's single-writer model makes PocketBase a weaker fit for applications with heavy concurrent write traffic than a Postgres-backed platform. | Low | Free |
| Appwrite | developer teams building web, mobile, or Flutter apps that want a Firebase-style backend (auth, database, storage, functions) they can self-host for free instead of relying solely on a vendor's cloud | Fully self-hostable under a permissive BSD-3-Clause license, so teams can run the entire backend on their own infrastructure at no licensing cost instead of being locked into Appwrite's hosted cloud. | The free Appwrite Cloud tier pauses projects after a week of inactivity and offers only community support, and self-hosting shifts the operational burden (updates, scaling, backups) onto the team instead of a managed vendor, which is a real cost some reviewers note as a steeper setup than a pure SaaS backend. | Moderate | Free tier · paid from $25/mo |
Convex
Supabase
PocketBase
Appwrite1.Supabase — best Convex alternative for developers who want a Postgres-based backend (auth, storage, realtime, auto-generated APIs) they can self-host later, rather than committing to a proprietary NoSQL platform like Firebase
Supabase is the best Convex alternative for developers who want a backend built on standard Postgres, with an Apache-2.0-licensed core they can self-host later, instead of committing permanently to Convex's proprietary TypeScript API. Supabase's Free plan covers up to 2 active projects with 500MB database storage and 50,000 monthly active users, and Pro runs $25/month with a $10/month compute credit included, close to Convex's own $25/developer/month Professional tier. Supabase holds a 5.0/5 rating from 861 Product Hunt reviews, far more review volume than Convex's 50, and its auto-generated REST, GraphQL, and Realtime APIs derive directly from the Postgres schema, with Row Level Security enforcing per-row authorization at the database layer. Convex is still the better choice for teams that want end-to-end TypeScript type safety without writing SQL and Row Level Security policies by hand: Supabase's compute is billed per project, so accounts running several projects stack recurring charges beyond the flat $25/month Pro fee, and its MAU and egress overages can produce unpredictable invoices, a risk Convex's simpler per-developer pricing avoids.
Compared to Convex: Apache-2.0-licensed Postgres core is self-hostable, 5.0/5 rating from 861 Product Hunt reviews vs Convex's 50, auto-generated REST/GraphQL/Realtime APIs derived directly from the database schema
Wins:Apache-2.0-licensed core is self-hostable, avoiding the hard vendor lock-in Convex's proprietary TypeScript API can create · 5.0/5 rating from 861 Product Hunt reviews, far more review volume than Convex's 50 reviews · Standard Postgres means existing SQL skills and extensions like pgvector and PostGIS carry over directly
Loses:Compute is billed per project, so accounts running several projects stack charges beyond the flat $25/month Pro fee, unlike Convex's per-developer pricing · Row Level Security has a steeper learning curve than Convex's end-to-end TypeScript type safety for teams new to SQL · MAU and egress overages beyond the Pro plan's limits can produce unpredictable invoices
Pros
- Full Postgres database rather than a proprietary NoSQL store, so existing SQL skills and extensions like pgvector and PostGIS carry over directly.
- Auto-generates REST, GraphQL, and Realtime APIs from the schema, with Row Level Security for per-row authorization.
- Apache-2.0-licensed core stack is self-hostable, avoiding hard vendor lock-in.
- Free tier includes unlimited API requests, 50,000 monthly active users, and a 500MB database with no time limit on the account.
Cons
- Compute is billed per project, so accounts running several projects stack recurring charges beyond the flat $25/month Pro fee.
- MAU overage ($0.00325/user past 100,000) and egress overage ($0.09/GB past 250GB) can produce unpredictable invoices at scale.
- Free-tier projects pause automatically after 1 week of inactivity.
- Row Level Security has a steeper learning curve than Firebase's simpler client-side security rules for teams new to SQL.
Pricing: Free tier · paid from $25/mo — $25/month (Supabase Pro) vs $25/developer/month (Convex Professional) (verified undefined NaN, NaN)
2.PocketBase — best Convex alternative for developers who want a single-binary backend (database, auth, storage, realtime API) for a side project or small-to-medium app without assembling separate services
PocketBase is the best Convex alternative for developers who want an entire backend — database, authentication, file storage, and a realtime API — shipped as one portable executable, with no separate services to provision and no cost at all. PocketBase is completely free and open source under the MIT license, with no managed cloud tier or per-developer subscription the way Convex charges $25/developer/month at its Professional tier. Its GitHub repository has over 60,000 stars, and the built-in admin dashboard lets non-technical users manage records without writing code, running on an embedded SQLite database instead of Convex's own reactive database engine. Convex is still the better choice for teams building anything beyond a side project or small-to-medium app: PocketBase has no official managed cloud offering, so scaling, backups, and uptime are entirely the developer's responsibility, and SQLite's single-writer model makes it a weaker fit for applications with heavy concurrent write traffic than Convex's reactive, ACID-transactional database, which also provides automatic real-time sync and full-text and vector search that PocketBase doesn't include.
Compared to Convex: completely free and open source (MIT) with no per-developer subscription at all, ships as a single portable executable with no separate services to provision, 60,000+ GitHub stars
Wins:Completely free and open source (MIT), with no per-developer subscription the way Convex charges $25/developer/month at Professional · Ships as a single portable executable — database, auth, storage, and realtime API — with no separate services to provision · 60,000+ GitHub stars and a built-in admin dashboard for managing records without writing code
Loses:No official managed cloud offering; scaling, backups, and uptime are entirely the developer's responsibility, unlike Convex's managed cloud platform · SQLite's single-writer model limits write concurrency compared to Convex's reactive, ACID-transactional database · No full-text or vector search, automatic real-time reactive sync, or scheduled jobs the way Convex provides
Pros
- Single executable bundles database, auth, storage, and a realtime API with no separate services to configure.
- MIT license with source fully available; no vendor lock-in.
- Built-in admin dashboard for managing records and users without writing code.
- JavaScript and Dart SDKs cover popular frontend frameworks including React, Vue, Svelte, and Flutter.
Cons
- No official managed cloud offering; every deployment is self-hosted and self-maintained.
- SQLite's single-writer model limits write concurrency compared to Postgres-based backends.
- Custom server-side logic requires extending PocketBase in Go or JavaScript hooks rather than a more general-purpose framework.
- Smaller ecosystem of official integrations and enterprise features than a hosted platform like Supabase or Firebase.
Pricing: Free — $0 (PocketBase, self-hosted only) vs $0 (Convex Free) or $25/developer/month (Convex Professional) (verified undefined NaN, NaN)
3.Appwrite — best Convex alternative for developer teams building web, mobile, or Flutter apps that want a Firebase-style backend (auth, database, storage, functions) they can self-host for free instead of relying solely on a vendor's cloud
Appwrite is the best Convex alternative for teams that want a Firebase-style backend — auth, database, storage, functions, and messaging — they can self-host for free under a permissive BSD-3-Clause license, instead of relying on Convex's managed cloud platform alone. Appwrite's free Cloud tier includes 2GB storage, 750K monthly executions, and 75K monthly active users, and self-hosting via Docker on any Linux server costs nothing at any scale, unlike Convex's Business tier, which starts at a $2,500/month minimum. Appwrite has 57.1K GitHub stars and Pro Cloud pricing starts at $25/month, matching Convex's own $25/developer/month Professional tier almost exactly. Convex is still the better choice for teams that want end-to-end TypeScript type safety between the database schema and application code and automatic real-time reactive sync built in: Appwrite's free Cloud tier pauses projects after a week of inactivity, and self-hosting shifts the operational burden of updates, scaling, and backups onto the team instead of Convex's managed cloud handling it automatically.
Compared to Convex: fully self-hostable under a permissive BSD-3-Clause license at no cost, Pro Cloud pricing starts at $25/month vs Convex's $2,500/month Business tier minimum, 57.1K GitHub stars
Wins:Fully self-hostable under a permissive BSD-3-Clause license at no licensing cost, an option Convex's managed cloud doesn't offer in the same way · Pro Cloud pricing starts at $25/month, far below Convex's $2,500/month Business tier minimum for SSO and dedicated deployments · 57.1K GitHub stars and broad SDK coverage across React, Next.js, Vue, Svelte, Flutter, and more
Loses:Free Cloud tier projects pause after a week of inactivity, unlike Convex's Free plan · Self-hosting shifts updates, scaling, and backups onto the team, work Convex's managed cloud platform handles automatically · No end-to-end TypeScript type safety between database schema and application code the way Convex provides natively
Pros
- Fully open source (BSD-3-Clause) and self-hostable for free, avoiding vendor lock-in on a core backend.
- Single platform covers auth, database, storage, functions, and messaging instead of stitching together separate services.
- Broad SDK coverage across major frontend frameworks and mobile platforms including Flutter.
- Free Appwrite Cloud tier is usable for real projects, not just a sandbox, with 75K monthly active users included.
Cons
- Free Cloud tier projects pause after a week of inactivity and get community-only support.
- Self-hosting requires managing updates, scaling, and backups yourself, shifting operational work onto the team.
- Reviewers note initial setup can be more complex than newcomers expect for a 'quick MVP' backend.
- Enterprise features (SSO, compliance certifications, SLAs) require a custom-quote plan rather than being available at a fixed price.
Pricing: Free tier · paid from $25/mo — $0 self-hosted or $25/month (Appwrite Pro Cloud) vs $25/developer/month (Convex Professional) or $2,500/month minimum (Convex Business) (verified undefined NaN, NaN)