Zernio review (2026): is the free plan enough?
One API for posting, messaging and ads across social networks
Black Friday: is there a Zernio sale?
Zernio report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for a posting API for apps and AI agents
Zernio, formerly called Late, is one API for posting to, reading from and messaging across many social networks. The first 2 accounts are free with every feature, but it's written for developers, not people after a content calendar, and X usage is billed at X's rates on top.
Who Zernio is for
- Fits if you're a developer adding social posting to your own app or agent
- Works for people who only need 2 connected accounts for free
Who Zernio is not for
- Not for you if you want a scheduler with a content calendar, since it's an API
- Skip it if you don't write code, because the pages are written for developers
- Watch out: X API usage is passed through at X's rates and billed separately
- Watch out: phone numbers, calls, ads and messages past 10,000 a month are metered on top, and prepaid balance is not refundable
Why Zernio gets a 2.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money2 accounts free, then $6 per account for accounts 3 to 10, so five accounts cost $18, near the $14 cheaper quarter, and it gets cheaper per account after 10.
- BFree plan and trialThe first 2 connected accounts are free with every feature and no card, enough for one person or a prototype.
- CFeaturesPosting and scheduling API, comments, DMs, analytics, webhooks, ads and phone numbers. The listing itself says it isn't a ready-made content calendar.
- DEase of useNo store rating on record. It's an API: you build against it with SDKs, so it needs a developer.
- BPlatforms and integrationsWeb dashboard and an API with SDKs, an MCP server, WordPress and about a dozen networks. No desktop or phone app.
What these grades rest on. Graded from this listing, whose facts were read from Zernio's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/zernio#review"><img src="https://toolgpa.com/badge/zernio.svg" alt="Zernio: 2.4 GPA on ToolGPA" width="196" height="56"></a>Where Zernio stands among social media schedulers
Zernio's GPA of 2.4 is higher than 65 of the 90 other social media schedulers we grade, and level with 16.
It stands best on free plan and trial (B, above 86 of 90) and worst on ease of use (D, above 0).
Its paid plans start at $6 a month, against a middle price of $24.46 for the category: 6 of the 79 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 5 tools score higher and cost less.
Each grade against the category
Every bar is all 91 social media schedulers we grade, cut by the letter each got. Zernio’s own letter is outlined.
- BValue for moneyAbove 72 of 90, level with 15
- BFree plan and trialAbove 86 of 90, level with 4
- CFeaturesAbove 2 of 90, level with 69
- DEase of useAbove 0 of 90, level with 5
- BPlatforms and integrationsAbove 20 of 90, level with 69
Price against what you get
Each dot is one of 80 social media schedulers. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Zernio, or make your own?
Keep it
To replace Zernio you would be making the WhatsApp Business API, which Meta opens only through approved partners. That is not a weekend's work, with an AI app builder or without one.
It is one of the better ones too: its GPA of 2.4 is higher than 65 of the 90 other social media schedulers we grade. It costs $72 a year.
What you could make
- Reports: an app builder makes this well.
What you could not
- The WhatsApp Business API, which Meta opens only through approved partners.
- An AI agent, with the models and the safeguards behind it.
- Texts from a business number, registered with the carriers.
- It plugs into other products, Instagram, TikTok and LinkedIn among them, and has an API.
What this rests on. Zernio’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Zernio?
Zernio, formerly called Late, is a developer-focused API that lets an app or an AI agent post to, read from and message across many social networks through one integration. It also covers blog publishing, ad managers, and phone numbers for SMS, calls and WhatsApp. Billing is per connected social account, with every feature on every account.
Worth knowing
- It is an API product: the pages are written for developers, not for people wanting a ready-made content calendar.
- X (Twitter) API usage is passed through at X's rates and billed separately from the per-account price.
- Prepaid balance does not expire and is not refundable, per its FAQ.
- Phone numbers, calls, SMS, WhatsApp, ads and messages beyond 10,000 a month are metered on top.
Key features
- Posting and scheduling API
- Unlimited posts, threads, first comments, queues and a calendar across its supported social networks.
- Comments, reviews and DMs
- Reply to comments, manage reviews and read and send direct messages through the same API; the first 10,000 messages a month are free.
- Analytics and webhooks
- Impressions, reach, engagement and follower tracking, plus real-time events for post status, messages and comments.
- Ads and blogs APIs
- Boost posts and create campaigns on several ad managers, and publish articles to WordPress, Shopify, Wix and Webflow.
- Phone numbers and messaging
- Buy numbers for SMS, calls and WhatsApp, itemized by usage, alongside the social inbox.
- MCP server and SDKs
- Offers an MCP server and client libraries so coding assistants and agents can call it.
Zernio pricing
As of Nov 13, 2026, Zernio has a free plan, and paid plans start at $6 per connected account / month, after 2 free accounts.
- Starts at
- $6 per connected account / month, after 2 free accounts
- Free plan
- The first 2 connected social accounts are free, with no credit card required.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free (first 2 accounts) | $0 | The first 2 connected social accounts cost nothing and carry every feature. |
| Build | $6per connected account / month for accounts 3 to 10, usage-based | Accounts 11 to 100 are $3 each and 101 and up are $1 each. Card on file, cancel anytime. |
| Enterprise | Custom | Offered past 2,000 accounts: custom rates, SAML SSO, SCIM, audit logs and a dedicated Slack channel. |
Read from zernio.com on Nov 13, 2026. Prices change, so confirm with Zernio before you buy.
Works with
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Common questions
Does Zernio have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Zernio is listed for Web.
Does Zernio have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Zernio is listed for Web.
Is Zernio open source?
Zernio is not described as open source on its own site, as read on Nov 13, 2026.
Does Zernio have an API?
Yes. Zernio offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.