KambaSMS

KambaSMS is a transactional messaging platform for Angolan businesses, fintechs, and developers that need to send SMS OTPs and critical transactional notifications to local mobile networks via a REST API.

Key capabilities include:

• OTP sending and verification via REST API, including automatic 6-digit code generation with 5-minute validity and an /otp/verify endpoint
• Angola network coverage support for valid numbers on Unitel, Movicel, and Africell, subject to network availability, with automatic +244 validation
• Anti-abuse controls that limit OTP requests to 3 requests per hour per number, plus balance checks before processing
• Delivery status, IDs, and history available in the dashboard and via API for tracking message state and activity

Available on Web (dashboard), REST API, and browser extension (Chrome and Edge) via KambaSMS Connect. SDKs are listed for Node.js, Python, PHP, and C#, plus a public Postman collection. API documentation is available at https://kambasms.ao/#docs.

It targets B2B teams in Angola building login verification (2FA), account recovery, payment receipts, order updates, appointment reminders, and security alerts. Promotional and marketing content is not supported and can result in account suspension without refund.

Notable in the Angolan market for its focus on local operator routing (Unitel, Movicel, Africell), prepaid credits that do not expire, local support in Portuguese, and an optional Kamba Email add-on for transactional email with a separate email balance.