InboxSync
@inboxsync.app
One API for email, WhatsApp, Telegram, Instagram, Messenger, and Discord. REST and GraphQL, real-time webhooks, OAuth handled. Free plan, no credit card.
InboxSync's Company Logos
InboxSync's Brand Colors
Hex Code
Color name
RGB
HSL
CMYK
#6366F1
Cornflower Blue
99, 102, 241
239, 84, 67
59, 58, 0, 5
#111827
Ebony
17, 24, 39
221, 39, 11
56, 38, 0, 85
#FFFFFF
White
255, 255, 255
0, 0, 100
0, 0, 0, 0
About InboxSync
InboxSync is a unified API platform that helps software teams connect customer email and messaging channels through a consistent set of tools. Its Inbox Sync API supports Gmail, Outlook, Yahoo, iCloud, Fastmail, ProtonMail, Zoho, AOL, GMX, and other IMAP mailboxes, as well as WhatsApp, Telegram, Instagram, Messenger, and Discord. Developers can work through REST or GraphQL endpoints to sync, send, search, and manage messages, with real-time webhooks for new activity.
The service handles authentication options including hosted OAuth flows, app passwords, bot tokens, and business API credentials, helping teams avoid building separate integrations for each provider. Features include persistent email sync, full-text search, message labels, attachment access, and signed webhook delivery with retries. InboxSync offers SDKs for Node, Python, Go, and Ruby, alongside documentation, quickstarts, and API references. It is designed for helpdesk, CRM, sales, AI agent, and recruiting products that need to bring conversations into one workflow. A free plan includes five connected accounts, with paid tiers available as usage grows.
Brand industry
Computers Electronics and Technology
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