Essential infrastructure
to Scale
your businesses.

Email, real-time currency conversion, and mobile & web push — every backend primitive your product needs, from one developer-first API. We handle global deliverability and scale so you can focus on shipping.

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TRUSTED BY FAST-GROWING TEAMS

insightsFinTrack
account_treeDevFlow
cloudCloudScale
paymentsPayScale
orbitOrbit
airNorthwind
receipt_longLedgerly
scienceQuanta
insightsFinTrack
account_treeDevFlow
cloudCloudScale
paymentsPayScale
orbitOrbit
airNorthwind
receipt_longLedgerly
scienceQuanta

ONE API, THREE PRIMITIVES

Send an email, price a currency, ping a device — same key.

A single REST API with predictable JSON and one bearer token. Wire it up in minutes and reach every channel your product needs.

  • check_circleIdempotent, retry-safe requests
  • check_circleReal-time delivery webhooks
  • check_circleFree tier — 10,000 calls / month
Read the API reference arrow_forward
POST /v1/send

{
  "to": "user@startup.io",
  "template": "welcome_onboarding",
  "variables": { "name": "Ada", "plan": "Founder" }
}

// → { "id": "msg_8f2a", "status": "queued" }

ONE PLATFORM

Powerful utilities, one single API.

More than just email. We provide the essential building blocks for modern SaaS backends.

mail

Email Marketing

Design responsive templates with our drag-and-drop builder or pure HTML. Manage lists and automate sequences with ease.

domain

Custom Domains

White-label your sending identity. Automatic DKIM, SPF, and DMARC configuration in seconds.

VERIFIEDverified
automation

Automation

Visual workflow builder for complex lifecycle emails. Trigger based on user behavior or external webhooks.

settings_input_component
send
currency_exchange

Currency Converter API

Real-time exchange rates for global startups. 230+ currencies — fiat, crypto, and precious metals — with sub-millisecond reads.

Explore the currency API arrow_forward
GET /rates/USD200 OK
{ "EUR": 0.92, "GBP": 0.79, "BTC": 0.0000157 }
notifications_active

Push Notifications

Reach iOS, Android, and browsers in one call. Bring your own FCM/APNs keys, run many apps, and send with the same API key as your email.

Explore push notifications arrow_forward
POST /push/apps/:id/send200 OK
{ "sent": 3, "failed": 0, "recipients": 3 }

DEVELOPER EXPERIENCE

Built for the people who ship.

Thoughtful defaults, honest docs and the tooling you expect — so you integrate once and move on.

code

SDKs & cURL

Copy-paste examples for Node, Python and cURL. Predictable REST, JSON everywhere.

webhook

Real-time webhooks

Stream delivery, open, click and bounce events straight into your systems.

vpn_key

One API key

Email, currency and push share a single key, dashboard and billing.

monitoring

99.9% uptime SLA

A globally distributed, warmed network with live status and incident history.

insights

Usage & logs

Searchable message logs, per-endpoint usage and quotas in one console.

bolt

Sub-10ms reads

Edge-cached currency reads and a lightweight ingest endpoint for every send.

GET STARTED IN MINUTES

From zero to sending in three steps.

vpn_key1

Grab an API key

Sign up and generate a scoped key in seconds. No sales call, no credit card.

dns2

Verify your domain

Paste one DNS record. We auto-configure DKIM, SPF, and DMARC and verify it for you.

send3

Send your first request

One POST to /v1/send and you're live — with delivery tracking and events out of the box.

BY THE NUMBERS

Built for high-growth engineering teams.

0M+
EMAILS MONTHLY
0+
CURRENCIES
<0ms
API LATENCY
0.0%
UPTIME SLA

SECURITY & COMPLIANCE

Enterprise-grade from your first API call.

The controls your security team asks for — on every account, no enterprise upsell. Ship on infrastructure you can put in front of auditors.

Explore security arrow_forward
verified_userSOC 2 Type II
shieldGDPR & DPA
enhanced_encryptionEncrypted at rest & in transit
medical_informationHIPAA BAA available
historyAudit logs
lockSSO & SAML

LOVED BY DEVELOPERS

Teams ship faster on startupAid.

starstarstarstarstar
“startupAid transformed our billing notifications. Weeks of deliverability fine-tuning now just work out of the box.”
SJ
Sarah Jenkins
CTO, PayScale
starstarstarstarstar
“We replaced two vendors with one API. Email and live FX rates from the same key cut our integration time in half.”
MR
Marcus Reed
Founder, Ledgerly
starstarstarstarstar
“The webhooks and event stream are flawless. Our lifecycle automation finally reacts in real time instead of on a cron.”
AO
Amara Okafor
Head of Eng, Orbit

Frequently asked questions

No. The Starter plan is free forever and includes 10,000 emails per month plus the currency API. Add a card only when you're ready to scale.

We manage IP warm-up, reputation monitoring, and automatic DKIM/SPF/DMARC on your custom domains, so your mail lands in the inbox without manual tuning.

Yes — every plan includes real-time exchange rates for 160+ currencies with cached sub-millisecond reads. Rate limits scale with your tier.

Absolutely. Our API mirrors common transactional-email patterns, and our team will help you move templates, domains, and suppression lists with zero downtime.

We never hard-stop production traffic. Overages are billed at the published per-unit rate, and we alert you well before you get there.

Ready to scale your communications?

Get 10,000 free emails per month to start building. No credit card required, just code.

Start Sending for FreeTalk to Sales

No credit card · 10,000 free emails/month · Cancel anytime