Evolution API vs WAHA: Full Comparison (2026)

Start with what they share, because it reframes everything else. Evolution API's WhatsApp Web connection and WAHA's NOWEB engine both run on Baileys. Neither project invented a new way to talk to WhatsApp. What they built is the service layer around it: the REST API, the webhook delivery, the dashboard, the session management. That is the actual product in both cases, and it is where the real differences live.

The decisive difference: what each one can connect to

Evolution API can front two completely different connections. It supports the Baileys-based unofficial route and Meta's official WhatsApp Cloud API, through the same REST shape. That means you can run some instances unofficially for cost and speed, and others through the verified official platform for compliance-sensitive traffic, without maintaining two separate systems. If you expect to need both at some point, this is a real structural advantage and it is the single biggest reason to pick Evolution over WAHA.

WAHA only speaks the unofficial route, across four engines. WEBJS and WPP drive a real browser through Puppeteer. NOWEB and GOWS talk WebSocket directly, with NOWEB running the Baileys fork mentioned above and GOWS running a Go-based implementation. All four get you onto WhatsApp Web's protocol as a linked device. None of them is Meta's Cloud API. The flexibility WAHA offers is a choice of unofficial engines, not a choice between official and unofficial.

If a hedge against ban risk, or an eventual move toward official compliance, is part of your planning, Evolution's dual-mode support is not a nice-to-have. It is the feature. Our Evolution API alternative post goes deeper into how that multi-provider support plays out in practice.

Infrastructure: one container versus four to six services

WAHA deploys from a single Docker container. For anything beyond a prototype you will want PostgreSQL rather than the default file store, but the baseline is genuinely one image, one port, a dashboard and Swagger docs on arrival.

Evolution API is a heavier stack by design. PostgreSQL for instances, messages and chat history. Redis for cache and session state. A persistent volume for authentication data, because an ephemeral one means re-scanning QR codes on every restart. Prisma migrations run on boot, and a missing migration table stops the server outright rather than degrading. High-throughput deployments add RabbitMQ, Kafka or SQS to decouple webhook delivery under load. That buys you durability and scale that a single container does not offer, at the cost of a stack with four to six moving parts, each with its own backup story and its own way to fail at 2am.

Community reports on Evolution consistently trace problems to VPS configuration and resource limits rather than to WhatsApp connectivity itself, which tells you where the maintenance burden actually lands once you deploy it.

Licensing: the thing that changed the calculation for Evolution

This is worth stating plainly because it is recent and it matters.

WAHA is Apache-2.0 with no activation step. Since version 2026.6.1, the tiered Core/Plus/PRO structure was retired, and everything that used to require a paid subscription — multi-session, media — ships in the free public image. You pull the container and it works.

Evolution API is Apache-2.0 with brand-protection conditions, and from version 2.4.0, instances must activate against Evolution Foundation's licensing server before the API serves traffic. The manager handles an HTTP 503 with LICENSE_REQUIRED, registers against an endpoint, and completes activation through a callback. Pinning to 2.3.7 avoids this, and plenty of deployment templates do exactly that, but pinning means you stop receiving fixes for a codebase tracking an undocumented, moving protocol — which is precisely the part you most want current.

If licensing independence matters to you specifically, this is the whole decision. Our WAHA alternative post covers what changed when WAHA dropped its own paid tiers, if you are comparing the two projects' trajectories rather than just their current state.

Integrations: Evolution goes deeper out of the box

Evolution ships native hooks for Typebot, Chatwoot, n8n, Dify and OpenAI, including audio-to-text, plus event streaming through RabbitMQ, Kafka, SQS, NATS, Pusher or Socket.io, and storage through S3 or MinIO. If your architecture already uses any of these, Evolution gets you there with configuration rather than code.

WAHA is more of a plain REST API with a dashboard and Swagger UI on top. It covers sessions, messaging and webhooks solidly, but it does not carry the same catalogue of native third-party hooks. If your actual integration target is something WAHA does not name, you are writing the connector either way, so this gap matters less than it looks.

Resource footprint

Evolution's WhatsApp connection runs on Baileys, so per-session memory sits in the same light range Baileys itself carries, tens of megabytes per connection rather than hundreds. WAHA's footprint depends entirely on which engine you pick: WEBJS and WPP drive a real Chromium instance and cost roughly a gigabyte of RAM per session by some estimates, while NOWEB and GOWS sit far lower, in the same range as Evolution's Baileys connection, since NOWEB is quite literally running a fork of it.

So the honest framing is that Evolution's resource profile and WAHA-on-NOWEB's resource profile should be similar, because they are close to the same underlying client. The gap only opens up if you pick one of WAHA's browser engines, in which case the comparison is really browser-automation-versus-socket, not Evolution-versus-WAHA. Measure your own deployment before sizing a server off any of these figures.

Open source activity

Evolution API currently sits at roughly 9,900 stars and 7,300 forks, with about 158 open issues and 82 open pull requests, maintained by the Evolution Foundation. WAHA sits at roughly 7,600 to 7,900 stars and around 1,800 forks. Raw star counts favor Evolution, but neither figure tells you about responsiveness or release cadence on its own — check recent commit activity and how quickly open issues get triaged before leaning on either number.

Side by side

Choosing

Pick Evolution API if you want the option to run official Cloud API instances alongside unofficial ones, you already use Typebot, Chatwoot, n8n or Dify and want native hooks rather than custom webhooks, and you are comfortable operating a multi-service stack or pinning to 2.3.7 to sidestep the activation server.

Pick WAHA if you want the simplest possible self-hosted deployment, you have no interest in Meta's official API and only need unofficial connectivity, and a permissive licence with no activation step matters to you. Choosing NOWEB or GOWS as the engine keeps your resource footprint close to what Evolution offers anyway.

Pick neither if the actual goal was to stop running WhatsApp infrastructure. Both projects leave you owning a server, a database, backups, monitoring and the protocol-drift risk that comes with any unofficial client. A hosted flat-rate API removes all of it: WaHttp, ours, is $5 a month for one session with unlimited messages up to $35 for ten, with REST endpoints and webhooks included and nothing to deploy. Our self-hosted WhatsApp API guide walks through the full infrastructure cost of either self-hosted option before you commit to either one.

What neither one changes

Both connect through WhatsApp's unofficial Web protocol when run in their non-Cloud-API mode, which carries the same terms-of-service exposure regardless of which project's dashboard you are looking at. Evolution's official Cloud API mode is the one configuration in this entire comparison that sidesteps that risk, because it is Meta's own platform rather than a linked-device client. If ban risk is the deciding factor for your use case, that single capability may settle the whole comparison before anything else on this page matters.