Plans & Billing — Starter, Growth & Scale Tiers

Ark uses a tiered plan model. Choose a plan based on your sending volume, number of domains, and tenant needs. All plans include full API access, webhook support, and email authentication.

Plans

	Starter	Growth	Scale
Price	$29/mo	$99/mo	$499/mo
Emails	50,000/mo	250,000/mo	2,000,000/mo
Domains	10	100	1,000
Tenants	Included	Included	Included
Support	Email	Priority email	Dedicated
Webhooks	Included	Included	Included
Tracking	Included	Included	Included
API access	Full	Full	Full

Free trial: New accounts get a free trial to evaluate Ark before choosing a plan. No credit card required to start.

Starter — $29/mo

For early-stage products sending transactional email from a single product or a few customer domains. Includes 50,000 emails and up to 10 sending domains.

Growth — $99/mo

For growing platforms onboarding customers onto their own sending domains. Includes 250,000 emails and up to 100 domains — enough for most mid-stage SaaS products.

Scale — $499/mo

For platforms with high-volume sending across many customer domains. Includes 2,000,000 emails and up to 1,000 domains with dedicated support.

Need more? Contact hi@arkhq.io for custom plans with higher volume or enterprise requirements.

Usage Tracking

Monitor your usage through the API or dashboard. Usage is tracked per tenant for white-label platforms.

Python
Node.js
cURL

from ark import Ark

client = Ark()

# Platform-wide usage
usage = client.usage.retrieve()
print(f"Emails sent: {usage.data.emails_sent}")

# Per-tenant usage
tenant_usage = client.tenants.usage.retrieve("tenant_abc123")
print(f"Tenant emails: {tenant_usage.data.emails_sent}")

import Ark from 'ark-email';

const client = new Ark();

// Platform-wide usage
const usage = await client.usage.retrieve();
console.log(`Emails sent: ${usage.data.emailsSent}`);

// Per-tenant usage
const tenantUsage = await client.tenants.usage.retrieve('tenant_abc123');
console.log(`Tenant emails: ${tenantUsage.data.emailsSent}`);

# Platform-wide usage
curl https://api.arkhq.io/v1/usage \
  -H "Authorization: Bearer $ARK_API_KEY"

# Per-tenant usage
curl https://api.arkhq.io/v1/tenants/tenant_abc123/usage \
  -H "Authorization: Bearer $ARK_API_KEY"

Limits

Check your current plan limits and usage at any time:

curl https://api.arkhq.io/v1/limits \
  -H "Authorization: Bearer $ARK_API_KEY"

Per recipient billing: You’re charged per recipient, not per API call. An email to 3 recipients counts as 3 emails against your plan limit.

Overage Handling

If you exceed your plan’s email limit, sending will be paused until:

Your billing cycle resets (monthly)
You upgrade to a higher plan

Plan ahead for spikes. If you anticipate a volume increase (product launch, marketing campaign), upgrade your plan in advance to avoid interruptions.

Plan Management

Manage your plan at arkhq.io/org/billing:

Upgrade anytime — takes effect immediately
Downgrade at the end of your current billing cycle
Cancel with no long-term commitments

Payment Methods

We accept credit and debit cards (Visa, Mastercard, American Express) via Stripe. Card details are never stored on our servers. Access invoices and receipts through the Stripe Customer Portal in your dashboard.

Error Handling

If your plan limit is reached, the API returns a 402 response:

{
  "success": false,
  "error": {
    "code": "plan_limit_reached",
    "message": "Monthly email limit reached",
    "suggestion": "Upgrade your plan at https://arkhq.io/org/billing"
  }
}

Python
Node.js

import ark
from ark import Ark

client = Ark()

try:
    email = client.emails.send(
        from_="hello@yourdomain.com",
        to=["user@example.com"],
        subject="Hello",
        html="<p>Hello!</p>"
    )
except ark.BadRequestError as e:
    if e.code == "plan_limit_reached":
        print(f"Upgrade your plan: {e.suggestion}")

import Ark from 'ark-email';

const client = new Ark();

try {
  await client.emails.send({
    from: 'hello@yourdomain.com',
    to: ['user@example.com'],
    subject: 'Hello',
    html: '<p>Hello!</p>',
  });
} catch (error) {
  if (error instanceof Ark.BadRequestError && error.code === 'plan_limit_reached') {
    console.log(`Upgrade your plan: ${error.suggestion}`);
  }
}

FAQ

What happens if I hit my email limit mid-batch?

Emails already queued will still be sent. New send requests will return 402 until your billing cycle resets or you upgrade.

Can I change plans mid-cycle?

Upgrades take effect immediately and are prorated. Downgrades take effect at the start of your next billing cycle.

Is there a free tier?

New accounts get a free trial to evaluate Ark. After the trial, choose a plan to continue sending.

Do unused emails roll over?

Email allocations reset monthly and do not roll over between billing cycles.

Next Steps

Manage Your Plan

View usage and upgrade in your dashboard

Architecture Overview

Learn how tenants and domains map to your billing

Getting Started

White-Label Email Architecture

Sending Email

Domain Setup

Webhooks

Tracking & Deliverability

Concepts

Migration

Reference

Plans & Billing — Starter, Growth & Scale Tiers

Plans

Starter — $29/mo

Growth — $99/mo

Scale — $499/mo

Usage Tracking

Limits

Overage Handling

Plan Management

Payment Methods

Error Handling

FAQ

Next Steps

Manage Your Plan

Architecture Overview

Getting Started

White-Label Email Architecture

Sending Email

Domain Setup

Webhooks

Tracking & Deliverability

Concepts

Migration

Reference

​Plans

​Starter — $29/mo

​Growth — $99/mo

​Scale — $499/mo

​Usage Tracking

​Limits

​Overage Handling

​Plan Management

​Payment Methods

​Error Handling

​FAQ

​Next Steps

Manage Your Plan

Architecture Overview

Plans

Starter — $29/mo

Growth — $99/mo

Scale — $499/mo

Usage Tracking

Limits

Overage Handling

Plan Management

Payment Methods

Error Handling

FAQ

Next Steps