Vesper is a WhatsApp API gateway that provides a simple REST API for sending messages, managing WhatsApp sessions, receiving real-time webhooks, and managing groups. It supports multi-session management and is designed for developers and businesses.

How do I integrate WhatsApp into my app?

With Vesper, you can integrate WhatsApp in 3 steps: 1) Create an app and get your API key, 2) Start a WhatsApp session by scanning a QR code, 3) Send messages using a simple POST request to the REST API.

What is the pricing for Vesper WhatsApp API?

Vesper offers 3 plans: Starter at €29/month (1 app, 2 sessions, 5K messages), Pro at €69/month (3 apps, 10 sessions, 25K messages), and Enterprise at €149/month (10 apps, 50 sessions, 100K messages). All plans include a 7-day free trial.

Does Vesper support multiple WhatsApp numbers?

Yes. Vesper supports multi-session management, allowing you to connect and manage multiple WhatsApp numbers simultaneously. Each session has its own QR code pairing, auto-reconnect, and health monitoring.

Can I receive WhatsApp messages via webhook?

Yes. Vesper provides real-time webhooks for all WhatsApp events including message received, message sent, message delivered, message read, session connected/disconnected, and group events. All webhooks are HMAC-signed for security.

WhatsApp API Comparison 2026

Vesper vs WATI

Vesper is built for developers, WATI is built for business teams. Compare the two approaches to WhatsApp integration.

Feature Comparison

Feature	Vesper	WATI
Starting Price	From €29/month	From $49/month
Target Audience	Developers & technical teams	Business & marketing teams
Message Limits	5,000 - Unlimited / month	1,000 - Unlimited (+ per-conversation)
Setup Time	Under 5 minutes (QR scan)	1-2 days (WABA approval)
API Quality	Full REST API, developer-first	API available but UI-focused
Webhook Support	HMAC-signed, configurable events	Webhook available
No-code Builder	API-first approach	Visual chatbot builder
Multi-session	Up to 10 WhatsApp numbers	Single number per account
Custom Integrations	Full API flexibility	Pre-built integrations (Shopify, HubSpot)
Shared Inbox	Build your own via API	Built-in shared inbox
Broadcast	API-based broadcast	UI broadcast tool
Support	Email to Dedicated	Email / chat support

Pros & Cons

Vesper

Advantages

Developer-first REST API — full control
Instant setup with QR code (no WABA approval)
Multi-session: manage up to 10 numbers
Lower starting price (€29 vs $49)
HMAC-signed webhooks
Build any custom integration with the API

Limitations

No built-in visual chatbot builder
No pre-built CRM integrations
Requires development skills for full utilization

WATI

Advantages

Visual chatbot builder (no-code)
Built-in shared team inbox
Pre-built integrations (Shopify, HubSpot, Zoho)
Template message management UI
Good for non-technical teams

Limitations

Higher starting price ($49/month)
Additional per-conversation charges
Requires WhatsApp Business API approval (1-2 days)
Single number per account
Limited API flexibility for custom integrations
Less control for developers

The Verdict

Choose Vesper if you are a developer or technical team that wants full API control, multi-session support, and predictable pricing. Choose WATI if you are a non-technical business team that needs a visual chatbot builder and pre-built CRM integrations out of the box.