Choosing the Right Plan

Blocx offers three plans: Pay-as-you-go, Scale, and Volume. See current pricing and your plan at Billing → Plans, or use the dedicated Choose Plan page during onboarding.

At a glance

How to choose

• If you're prototyping or running US-only SMS and email at modest volume, Pay-as-you-go is the right starting point. You're billed against your prepaid balance per send (SMS, email, 2FA verifications, number fees, mailbox fees).
• If you need MMS, RCS, or Telegram, send outside the US, want better per-message rates, or need more than one sending domain or API key, move to Scale.
• If your volume is large enough to negotiate on, or you need dedicated routing and an uptime SLA, ask about Volume.

How Scale billing works

Scale has no subscription fee. Its $1,000/month minimum works the way carrier commitments usually do: you prepay credit, you spend it, and if a month's usage comes in under the minimum you're charged the difference.

1. The day your account moves onto Scale we charge $1,000 to your card, credit the full amount to your balance, and switch you to your Scale rates.
2. Your usage draws that balance down at those rates. If you send more than the minimum and your balance runs low, we top up another $1,000 so your traffic keeps flowing.
3. At the end of each 30-day cycle we add up what you spent. If it's under $1,000, the difference is charged to your balance as a minimum spend shortfall, so the month totals the minimum. Spend at or above $1,000 means no shortfall.
4. Credit you haven't used is never taken away — it stays on your balance for the next cycle.

The first 60 days carry no minimum beyond that opening $1,000: no shortfall is charged for cycles inside the window, and if you spend the opening credit you can top up on demand.

If there's no card on file when your account is moved onto Scale, the plan and its rates still apply and the opening block is charged as soon as you add one.

Keep a default payment method on file at Billing → Payment methods. If a commitment charge is declined we pause further attempts and email you, so a stale card doesn't get retried indefinitely.

Scale promo codes

If our team or a partner has given you a Scale promo code, you can move onto Scale yourself instead of waiting for a contract. Under the Scale card at Billing → Plans pick Have a promo code?, enter the code, and apply it — the dialog shows the monthly minimum that code carries before you confirm. You get Scale's full rate card and every Scale capability; the only difference is the size of the minimum. BLOCX1001, for example, sets a $100 monthly minimum instead of $1,000: $100 is charged to your card when you confirm, and the shortfall at the end of each cycle is measured against $100.

The code has to be applied before you confirm, and a card is required because the first month's credit is charged right away. If the charge is declined, nothing changes — you stay on your current plan and can try another card.

Moving between plans

Pay-as-you-go is self-serve — you're placed on it automatically when you create an account. Scale and Volume are set up by our team, because committed spend and negotiated rates only exist once a contract is signed: use the Contact sales button on either card, or email support@otterblocx.com. The exception is a Scale promo code (see above), which lets you move onto Scale from the picker yourself. Moving your account over applies your rates and bills your opening commitment in one step, so your first send is already priced correctly.

If you signed up before August 2026 you may be on the retired Pay as you go or Enterprise plan. Those keep working exactly as before — your 3,000 monthly included emails, the rates you signed up at, and MMS, Telegram, toll-free ordering, restricted verticals, and multiple API keys — until you choose to move.

Capabilities by plan

Each plan enables a set of capability flags. Calling an endpoint your plan doesn't include returns 402 CAPABILITY_REQUIRED. The current plan card at Billing → Overview shows which are active on your subscription.

A campaign counts as a restricted vertical when it's age-gated (alcohol, tobacco, firearms), involves direct lending, or uses the Sweepstake, Political, or Public Safety Restricted use case.

Toll-free numbers you already own keep working if you move to Pay-as-you-go — the check only applies to new orders. The same is true of extra domains and API keys: existing ones stay, new ones are blocked.

RCS and short codes appear on the Scale card but aren't live yet; nothing is blocked for anyone today, and the plan flags are in place for when they ship.

Related articles

• Understanding Quotas and Usage
• Topping Up Your Account Balance
• Viewing Invoices and Billing History
• Adding a Payment Method