Feature Catalog

Everything you need to send, automate, and grow

Flow gives your team access to email campaigns, customer journeys, developer APIs, webhooks, subscriber management, and analytics. Choose the credit package that matches your sending volume and scale as your business grows.

Platform Capabilities

These are the product areas currently represented in the application and dashboard.

Sending Operations

Core controls for getting email out safely and reliably.

  • Business workspaces for campaigns and transactional email
  • Custom sending domains with sender identity management
  • Campaign builder with reusable HTML templates
  • Campaign dry-run preview for reach, exclusions, and bounce risk
  • Credit-based send accounting with PayPal top-ups

Audience Management

Tools for keeping subscriber data usable and safer to send to.

  • Manual subscriber management and CSV imports
  • Tags, custom attributes, and rule-based segments
  • Smart segment creation from analytics definitions
  • Unsubscribe, bounce, complaint, and suppression-aware workflows
  • Bounce management and bounced email export

Developer Platform

API and webhook surfaces for product and engineering teams.

  • Bearer-authenticated transactional email API
  • API keys with scoped permissions and optional expiration
  • Subscriber API endpoints
  • Signed outbound campaign event webhooks
  • Inbound event triggers for application-driven email workflows

Reporting and Controls

Visibility for marketers, operators, and technical teams.

  • Campaign analytics for opens, clicks, bounces, and delivery state
  • Transactional email status history
  • Webhook event logs, response history, and webhook analytics
  • Premium toggles for send-time optimization, email validation, and advanced analytics
  • Payment request review and transaction history

Account and Paid Credit Tiers

Every account starts with free credits. Paid tiers are top-up packages that increase sending runway without turning the platform into a subscription plan.

View pricing estimator →

Starter Account

Free 500 credits

Trying the workspace and sending first tests

  • Create a business workspace
  • Set up domains, senders, subscribers, and templates
  • Use dashboard campaign tools and API documentation
  • No credit card required

Basic

$9 10,000 credits

Small launches and low-volume campaigns

  • All Starter Account platform features
  • PayPal top-up workflow
  • Campaign sends and transactional API sends
  • Credit ledger and payment history
Most popular

Standard

$39 50,000 credits

Growing marketing lists and regular lifecycle campaigns

  • All Basic platform features
  • Lower effective cost per 1,000 credits
  • Better fit for recurring campaign volume
  • Same operational controls across UI, API, and webhooks

Premium

$69 100,000 credits

Higher-volume teams that need more sending runway

  • All Standard platform features
  • Lowest listed cost per 1,000 credits
  • Best fit for larger campaign calendars
  • Premium workspace toggles available in settings when enabled

Need the short version?

Start free, configure your sending workspace, then top up credits based on the volume you actually send.

Create your account →