Conflict-of-interest note up front, same as we'd want from anyone else writing this comparison: we build WaHttp. We think it's a good product for the use case it targets. We also think Evolution API is a genuinely strong piece of open-source engineering that's the right call for a meaningful slice of the people reading this. Take the framing below with that in mind, and don't take our word for either project's current state — check the repo and the docs before you commit infrastructure decisions to it.
What Evolution API actually is
Evolution API is an open-source WhatsApp integration platform, originally built on top of CodeChat and the Baileys library. It's released under Apache License 2.0 with some added brand-protection terms (logo and copyright preservation, a usage-notification clause), and as of this writing it sits at roughly 9.9k GitHub stars and 7.4k forks — a genuinely active project, not an abandoned side effort.
The thing that sets it apart from most other open-source WhatsApp tooling is that it isn't locked to one connection mode. An Evolution API instance can run against the Baileys-based WhatsApp Web protocol — the same unofficial, session-based approach WaHttp, WAHA, and whatsapp-web.js all use — or it can connect to Meta's official WhatsApp Business (Cloud) API. You configure that per instance, which means a single Evolution API deployment can run some numbers unofficially and others through Meta's sanctioned, verified path side by side. That's a real architectural advantage if your roadmap includes a migration to the official API, or if you want a mixed fleet: unofficial numbers for low-stakes internal tooling, official numbers for anything customer-facing and compliance-sensitive.
On top of that, Evolution API ships native integrations with Chatwoot and Typebot, plus support for Dify, OpenAI (for audio transcription), Flowise, n8n, Socket.io, and Kafka. If your stack already includes a support-desk tool like Chatwoot or a visual bot builder like Typebot, that native wiring saves real integration work.
The cost of that flexibility is that Evolution API is software you run, not a service you buy. It requires Node.js 20+, PostgreSQL or MySQL (accessed through Prisma), and recommends Redis for caching; for media storage you can use local disk or wire up S3/MinIO. There's no managed cloud offering from the project itself — the deployment options in the docs are Docker images and manual installation, with one third-party VPS partnership mentioned for convenience. Running it in production means you own the database, the cache, the queue backend if you add one (RabbitMQ, SQS, NATS, Pusher, or WebSocket are all supported), the uptime, and the upgrade cycle.
We go deeper on how the Baileys-mode side of Evolution API actually behaves relative to the raw library in Evolution API vs Baileys.
What WaHttp actually is
WaHttp is the opposite trade: a hosted HTTP API over the same kind of session-based, unofficial WhatsApp Web protocol, but packaged so you never touch a database, a Docker Compose file, or a Prisma migration. You connect a number by scanning a QR code or entering a pairing code, same as adding a linked device in the real app, and WaHttp's infrastructure handles reconnects, message queuing during disconnects, and per-session rate pacing through what we call Smart Queue — including warm-up pacing for brand-new numbers. We're explicit that this reduces ban risk rather than eliminating it; nobody selling access to this protocol can honestly promise zero risk, and we say so on our own pricing page.
WaHttp is priced flat, not per message: a 24-hour free trial (one session, 100 messages/day, no card required), then $5/month for one session on Starter, up to $35/month for ten sessions on Agency, with custom dedicated deployments for Enterprise. Unlike Evolution API, WaHttp has no official Cloud API mode — it's a session-based tool only, full stop, and we're not going to dress that up as something it isn't.
Where WaHttp leans into a different niche than Evolution API is AI-agent tooling: an MCP endpoint at app.wahttp.com/mcp lets assistants like Claude or Cursor send and manage WhatsApp messages directly, alongside more conventional n8n, Make, and Zapier integrations for no-code automation.
Cost: software you run vs a service you buy
Evolution API itself costs nothing to license. What it costs is infrastructure and your own time, and that's the part self-hosting comparisons routinely underestimate. A realistic minimum for a small production deployment looks something like: a VPS sized for Node.js plus a database, roughly $20–40/month; managed Postgres (or the discipline to run and back up your own), another $15–50/month if you don't bundle it on the same box; Redis, usually a few dollars more if managed separately, or folded into the VPS if you're comfortable co-locating it; TLS, monitoring, and log retention, call it $10–30/month; and, if you're using S3 or MinIO for media, a small additional storage bill. That puts a bare-bones self-hosted Evolution API stack somewhere in the $50–120/month range before you count your own time — and Evolution API's dependency list (Prisma migrations, Redis, optional message-queue backends, Docker lifecycle management) is a notch more involved to operate correctly than a simpler Baileys wrapper, so budget more like 5–10 hours a month of ops attention at whatever your blended engineering rate is, versus the lower end of that range for a lighter self-hosted tool.
WaHttp's flat tiers include unlimited messages with no per-message metering, which means the comparison isn't really "which costs less in absolute dollars" — at low session counts, WaHttp's $5–12/month tiers are cheaper than almost any self-hosted infrastructure bill, full stop. The real question is where your break-even sits once you're running enough sessions, and at what point the value of owning your own infrastructure (no vendor dependency, no data passing through a third party, the option to run official-API instances alongside unofficial ones) outweighs the ops time it costs you. We've run this same break-even math against a lighter self-hosted comparator before, and the shape of the trade-off holds here too, with one wrinkle: Evolution API's extra moving parts (and extra capability) shift the ops-time side of the equation up a little compared to a simpler self-hosted tool.
Control, data residency, and vendor lock-in
Self-hosting Evolution API means your message data, session credentials, and webhook payloads never leave infrastructure you control. For teams under strict data-residency rules, or anyone who's simply decided they don't want a third party holding WhatsApp session data as a matter of policy, that's not a minor point — it can be the only point that matters, and it's a legitimate reason to pick Evolution API over WaHttp regardless of anything else in this post.
With WaHttp, session data passes through our infrastructure, encrypted in transit (TLS 1.3) and with credentials and API keys encrypted at rest, but it's still a third party in the data path. We think that's a reasonable trade for the ops burden it removes, but it's a trade, not a non-issue, and anyone evaluating this seriously should weigh it as one. We cover the general self-hosting-for-control argument, independent of which specific tool you'd self-host, in Self-Hosted WhatsApp API.
Vendor lock-in cuts the other way, though. Evolution API, being open source and dual-mode, gives you an exit ramp: you can migrate instances to the official Cloud API without switching platforms, or move your self-hosted deployment to different infrastructure entirely, since you own the whole stack. Moving off a hosted provider like WaHttp means re-establishing sessions and rebuilding integration logic elsewhere — the switching cost is real, and it's worth asking any hosted vendor, including us, what that migration path looks like before you depend on it at scale.
Ban risk: it depends on which mode you're running
This is where Evolution API's flexibility actually matters for risk, not just convenience. An Evolution API instance running in Baileys mode carries essentially the same exposure as WaHttp, WAHA, or raw Baileys: you're connecting through WhatsApp's multi-device linked-device protocol without Meta's authorization, which sits in the same Terms-of-Service gray zone we laid out in detail in Official vs Unofficial WhatsApp API. Neither tool, nor any vendor selling access to this protocol, can promise a number won't get flagged — WhatsApp doesn't publish a linked-device rate limit, and enforcement is driven by spam-shaped behavior more than by which client is doing the connecting.
But an Evolution API instance running in official Business API mode doesn't carry that exposure at all — it's going through Meta's sanctioned path, with the business verification, template approval, and per-message billing that comes with it. That's a mode WaHttp simply doesn't offer. If your production plan is "start unofficial for speed, move to official once we're verified and have volume," Evolution API lets you do that migration inside one platform. WaHttp doesn't have an answer to that scenario beyond "export your logic and rebuild it against the Cloud API elsewhere."
So which one do you actually run
Run Evolution API, self-hosted, if you have in-house ops capacity (or a DevOps budget) and want zero recurring software cost at real scale; if data residency or vendor independence is a hard requirement rather than a preference; if you already use Chatwoot or Typebot and want native wiring instead of building it yourself; or if you want the option to run some numbers officially and some unofficially from one platform, possibly as a deliberate migration path.
Run WaHttp if you want to be sending messages within minutes rather than after a Docker Compose session and a Prisma migration; if your session count is small enough that $5–35/month flat beats a $50–120+/month infrastructure bill plus your own time; if you want warm-up pacing and reconnect handling built in rather than configured by hand; or if your use case is AI-agent-driven and the MCP endpoint saves you from building that integration layer yourself.
Plenty of production setups don't pick one exclusively. A team with the ops capacity can self-host Evolution API for its core, high-volume numbers — especially ones worth migrating to the official API eventually — while keeping a WaHttp session or two around for quick internal tools, staging environments, or anything where a developer would rather not wait on infrastructure to test an idea. That split, more than a single winner, is usually the honest answer.
This post isn't legal advice. Evolution API's licensing, dependency list, and feature set, and WaHttp's pricing and features, are all subject to change — check both projects' current documentation before making an infrastructure decision. Both the unofficial Baileys-based connection mode discussed here and WaHttp itself operate outside WhatsApp's Terms of Service for automated access; see the linked post above for the full discussion. WaHttp is built by JahaSoft Ltd and is not affiliated with WhatsApp LLC, Meta Platforms, Inc., or the Evolution API project.