AWeber API
AWeber runs a self-serve developer program at labs.aweber.com with a JSON REST API for subscribers, lists, broadcasts, campaigns, and stats. Auth is OAuth 2.0 with PKCE and webhooks are supported. The rate limit is fixed at 120 requests/min per account and cannot be raised on any plan.
Frequently asked questions
AWeber scores B on the API Report Card. AWeber runs a self-serve developer program at labs.aweber.com with a JSON REST API for subscribers, lists, broadcasts, campaigns, and stats. Auth is OAuth 2.0 with PKCE and webhooks are supported. The rate limit is fixed at 120 requests/min per account and cannot be raised on any plan.
AWeber has a workable official integration path. Most engineering teams can build against it directly. Solid API with minor gaps
AWeber is a cloud-based email marketing and automation platform aimed at small businesses, solopreneurs, bloggers, creators, and small ecommerce shops.
Vertical: Email marketing / marketing automation (horizontal SaaS, not industry-specific). A solopreneur or small business connects a sender domain, imports a contact list, and uses the drag-and-drop builder to send newsletters or broadcasts to segmented lists.
AWeber reports approximately 120,000 customers as of 2024 with $52.8M in revenue, and the platform claims a 4.9-star self-reported rating across 2,054 customer reviews.
Yes, for any business that runs email marketing on AWeber, the platform is the system of record for the full subscriber dataset (contacts, custom fields, tags, segments, consent/subscription status), every email broadcast and automation message ever sent with open/click/bounce/unsubscribe history, signup form and landing page submissions, web push subscribers, basic ecommerce store orders and payments, and behavioral tracking events.
Founded 1998 in Chalfont, Pennsylvania by Tom Kulzer, making AWeber one of the oldest continuously operating email marketing platforms (27 years old as of 2026).
Rate limit is fixed at 120 requests/minute per customer account and cannot be raised or removed regardless of plan tier, breaking high-volume sync jobs. OAuth 2.0 access tokens reported as intermittently invalid/expired on ~1 in 20 requests, requiring constant refresh handling in third-party integrations. Full sourced list under Sources below.
Common alternatives include Mailchimp (Intuit), Constant Contact, ActiveCampaign, Kit (formerly ConvertKit), Brevo (Sendinblue), GetResponse. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.