Subscribe to hundreds of curated newsletters automatically. Research competitors, train your email filters, and test your tools. On autopilot.
Free forever · No credit card required
Fill any inbox with real newsletters from legitimate senders — instantly. Populate test accounts, generate authentic traffic, or bulk-subscribe any email address.
Subscribe to competitor newsletters simultaneously. Track strategies, funnels, and copy in one inbox.
Train Gmail and Outlook filters faster with real categorized email volume instead of synthetic mocks.
Authentic email traffic for testing parsers, spam detection, and automation pipelines. No fixtures.
Provide the email address you want newsletters delivered to. Gmail, Outlook, or custom domain — all work identically.
Choose from 8 curated niches (Pro) and set how many newsletters you want. Discovery or High-quality mode.
InboxFlood subscribes automatically. Newsletters arrive within hours. Need to undo it? Unsubscribe from everything in one click from your dashboard.
Enter your email, pick a niche, set volume — InboxFlood handles everything.
Monitoring 40+ newsletters across my niche has never been easier. Saved me hours of manual setup.
I monitor 40+ competitor newsletters at once now. Would have taken me hours to subscribe manually.
Our QA team needed realistic inbox data for testing. InboxFlood generates it in seconds instead of days.