Pricing

Zernio is usage-based. You pay per connected social account, with everything (Analytics, Inbox, Ads, unlimited posts) included on every paid account. No plan tiers, no add-ons, no profile limits.

Free

$0/month — first 2 connected accounts are always free.

No credit card required. Includes Analytics, Inbox, Ads, and full API access on every account.

Usage

Pay only for the accounts you connect, with all features bundled. Add or remove accounts at any time — billing is prorated by the day.

The pricing is graduated: each account is billed at the rate of its tier band, not at one flat tier. So 20 connected accounts costs $6 × 8 + $3 × 10 = $78/month (the first 2 are free).

Try the calculator

A worked example for common scales:

For more than 2,000 accounts, get in touch at zernio.com/enterprise for a custom contract.

What's included

Everything is bundled with every paid account — no add-ons, no upgrades.

No profile limits, no post-per-month caps, no per-feature pricing. Connect accounts, schedule posts, use every feature.

Other charges

A couple of items aren't priced per account. They appear as separate line items on your invoice when used.

WhatsApp Business numbers

From $2 per WhatsApp number / month, separate from the social-account price. US numbers are $2/mo; numbers in other countries are priced per country (typically $2 to $25/mo) and are shown before you confirm the purchase. Regulated countries require a one-time identity verification (KYC) before the number is provisioned. Separately, Meta bills its own usage fees directly to your WhatsApp Business account, not through Zernio: per delivered template message, and a per-minute rate for outbound calls. Inbound calls and in-window service messages are free.

X (Twitter) API

X's pay-per-call API costs are passed through at exact rate, with zero markup. Each X API operation (post, read, DM, etc.) is metered against your account at X's published price (e.g. $0.005 per Posts: Read, $0.015 per Content: Create). See docs.x.com/x-api/getting-started/pricing for the full table.

X usage applies only when you have an X account connected. Customers can set a monthly X spend cap from the dashboard to avoid surprise bills.

How billing works

• We charge your card automatically as you accrue usage. The first time your accrued usage reaches a small fraud-protection threshold (starting at $10), your card is charged for that amount and the threshold doubles for next time. Established customers see fewer, larger charges; brand-new paying customers see one quick small charge to validate the card.
• Each invoice is itemized — you see exactly which accounts, WhatsApp numbers, and X-API calls you're paying for.
• You can connect or disconnect accounts at any time. Billing prorates by the day.
• Powered by Metronome on top of Stripe for invoicing.

Daily proration mechanics

Accounts are metered per day, not per month-snapshot. Every day, our system records which accounts are connected and reports them to the billing engine — one event per active account per day. The per-day mechanism means you only pay for the days each account was actually active.

For a single account in a single tier, the cost works out to:

account_cost = tier_rate × (days_active / days_in_month)

So a $6/month account connected for 15 days costs $3 that month. If you connect on day 1 and disconnect on day 15, you're billed for the half you used.

How it interacts with graduated tiers

Because pricing is graduated ($6 / $3 / $1), the rate isn't fixed per-account — it depends on your total billable units for the month, computed as:

billable_units = (sum of all account-days in the month) ÷ days_in_month

That total is then run through the graduated tier ladder (first 10 units at $6, next 90 at $3, next 1,900 at $1). You never get charged tier-1 prices for units that fall into tier 2 or 3 — partial usage in higher tiers gets the lower rate.

Mental model: at the end of the month we add up every "account-day" (one per account per day connected), divide by 30, and run the result through the rate ladder. So 100 accounts × 3 days costs the same as 10 accounts × 30 days. The graduated rates apply to the total, not to individual accounts.

The calculator reflects the exact math the billing engine uses: account-days → divide by 30 → graduated tiers → minus $12 free-tier credit.

Worked example

A customer has 10 accounts connected for the full month. In week 2 they connect an 11th account, then disconnect it in week 3. In week 4 they connect a 12th, different account, for the rest of the month.

Step 1 — count account-days:

Step 2 — convert to billable units:

314 ÷ 30 = 10.467 billable units

Step 3 — apply graduated tiers:

Step 4 — apply the free-tier credit:

The total bill is not "11 accounts" or "12 accounts" — it's the sum of all account-days converted into billable units, then run through the graduated rates. The 11th and 12th accounts (which only existed for partial weeks) push the total just past the tier-1 boundary, so their fractional contribution is priced at tier 2's $3 rate, not tier 1's $6.

Common questions

• What window does Zernio measure activity in? Calendar month — account-days accumulate from the 1st to the last day of each month, then flush into a new period.
• If I disconnect and reconnect the same account, does it count twice? Each day it's active counts. If it's active for 10 days, disconnected for 5, then reconnected for 10 more (same calendar month), that's 20 account-days for that account.
• What if I connect a brand-new account mid-month? Charged from the day it's connected onward, prorated through end-of-month.
• Which accounts pay tier-1 vs tier-2 rates? The graduated rate isn't tied to individual accounts — it applies to the total billable units. The first 10 units of usage are at $6, units 11-100 at $3, and so on. So if your monthly total works out to 12.5 billable units, the first 10 are billed at $6 and the remaining 2.5 at $3.
• What about the free-tier credit? Each calendar month grants $12 of credit (covers the first 2 accounts at the $6 tier). Credit applies to the gross monthly total — it's a flat per-month grant, not per-account.

Get started

Sign up at zernio.com — first 2 accounts free, no credit card required.