All your emails connected in a single platform
Create, organize and send emails from any system using reusable templates, dynamic variables and a simple API.
Centralize, connect and control your emails
Create a reusable template, connect it to your systems via API and control every send from a single place.
1. Create your template
Start from scratch or from a ready-made template and edit subject, copy, CTA, links and footer.
2. Connect your systems
Define dynamic variables and connect your product, backend or automation through a simple API.
3. Control every send
Publish the template, send it from any system and track deliveries, opens and errors in one place.
Transactional emails shouldn't live buried in your code
Changing a piece of copy, tweaking a subject line or updating a critical template usually means tickets, technical reviews, deploys and waiting. Meanwhile, emails like password recovery, onboarding, billing or security alerts stay hard to maintain, measure and control.
Slow changes
A small content tweak can end up depending on a sprint or a deploy.
Little autonomy
Product, marketing or support have to ask engineering for help with simple changes.
Technical risk
Broken variables, duplicated templates or inconsistent content can reach production.
Lack of traceability
It is hard to know which version was sent, when it changed and what happened with each email.
Centralize your templates. Connect all your systems. Control every send.
SentFast lets you manage your emails from a single platform and send them via API from any product, backend, workflow or internal tool. Once the template is created, any system can reuse it with the right variables.
Scattered emails
Every product, tool or automation manages its own emails separately.
Duplicated templates
The same communication ends up recreated over and over across different systems.
Manual or technical changes
Every tweak depends on touching code, reviewing an automation or asking for help.
Inconsistent variables
Each tool handles dynamic data its own way, increasing the risk of errors.
Little traceability
It is hard to know which email was sent, from where, with what data and with what result.
One integration per case
Every flow needs its own connection, hard to maintain and scale.
Centralized emails
All your templates live in a single platform, ready to be reused.
Reusable templates
Create once and reuse the same template from any system.
Controlled editing from the interface
Update content from a visual interface, without touching code.
Defined dynamic variables
Each template declares its variables and receives consistent data on every send.
Logs and metrics per send
Audit every email: what was sent, when, from where and with what result.
A simple API to connect everything
Integrate once and trigger emails from product, backend, workflows or internal tools.
From template to API send in minutes
Create an email
Start from scratch or from a ready-made template for common cases.
Customize the content
Edit subject, copy, CTA, links and footer from a visual interface.
Define dynamic variables
Set up the data each system will send: user, company, link, amount or date.
Preview the result
Check how the email will look with real or test data before publishing it.
Publish the template
Save a stable version ready to be used from your systems.
Send it from any system
Connect your product, backend, automation or internal tool through a simple API.
Emails for any flow in your product or business
Centralize product, operations, business and support communications without building a different integration for each case.
Product
Welcome
Create a polished first experience for new users with editable, reusable templates.
Account confirmation
Send verification messages with dynamic links and safe variables.
Team invitation
Personalize invitations for workspaces, organizations or collaborative products.
Onboarding
Connect activation, first-steps or recommendation emails from your product flows.
Operations
Alerts
Send notices when an important event happens in your system or process.
Reminders
Automate recurring or actionable emails for users, customers or internal teams.
Status changes
Communicate updates to orders, requests, tasks, processes or incidents.
Internal notifications
Inform internal teams about relevant activity without relying on manual emails.
Business
Purchase confirmations
Send clear confirmations with dynamic order, user and amount data.
Invoices
Manage variables like invoice number, date, customer, amount and download link.
Renewals
Create emails for renewal notices, expirations, plan changes or upcoming charges.
Recurring summaries
Send automated reports with personalized information from your systems.
Support
Follow-ups
Automate messages after a conversation, ticket or request.
Incident resolution
Communicate closures, updates or next steps with full traceability.
Surveys
Send satisfaction surveys connected to events or interactions.
Personalized communications
Let your internal tools trigger consistent, controlled emails.
Everything you need to manage connected emails
Reusable templates
Create consistent emails for different flows, products and systems.
Dynamic variables
Define placeholders and personalize each send with the data the API receives.
Editor with preview
Edit content and review the result before publishing a template.
API sending
Trigger emails from your product, backend, automations or internal tools.
API keys
Connect your systems securely using independent keys.
Send logs
Check what was sent, when, from where and with what result.
Analytics
Measure sends, delivery, opens, clicks, bounces and errors.
Webhooks
Receive delivery, open, click or failure events in your own systems.
Roles and permissions
Give autonomy to create and edit emails without losing control over publishing and configuration.
Built for teams that need to send emails without duplicating work
For engineering
Integrate once and let other teams manage content without touching the sending logic on every change.
For product
Create and adjust onboarding, activation, notification or user communication emails from a centralized platform.
For marketing
Reuse templates, adapt messages and connect communications to real product or business flows.
For support and operations
Check which email was sent, when, from where, with what version and with what result.
A simple API for emails that change without touching your backend
Integrate once, manage everything from SentFast. Your app calls a published email, sends the required variables and SentFast takes care of rendering, validating, sending and logging every event.
- API keys per environment.
- Required variables validated before sending.
- Webhooks for delivery, open, click and error events.
- Logs to debug every send.
Send emails in a few lines of code
Keep your templates under version control. Send variables with real-time interpolation and authenticate with your project API key — no redeploys needed.
// POST /api/v1/email/send
curl -X POST "https://your-domain.com/api/v1/email/send" \
-H "Content-Type: application/json" \
-H "x-api-key: sf_live_••••••••" \
-d '{ "id": "em_xxxxxxxxxxxxxxxx", "to": "client@company.xyz", "params": { "user_name": "Alex" } }'Know what was sent, when and with what result
SentFast logs every send so you can understand the performance of your critical emails and resolve incidents quickly.
Autonomy to edit, control to publish
Let more teams collaborate on emails without losing security. Define permissions, separate environments and control which versions reach production.
Role-based permissions
Not every user needs to be able to publish or manage keys.
Separate environments
Work with development, staging and production in an organized way.
Managed API keys
Create, rotate, revoke and scope keys per environment.
Version history
Every change is logged so you can audit and restore.
Frequently asked questions
Everything you need to know before getting started with SentFast.
It can act as a management and sending layer for transactional emails. Depending on your architecture, it can integrate with infrastructure providers or handle sending directly.
Start managing your transactional emails like a product
Create your first project, set up a template and send your first email via API in minutes.