OpenTweet vs Zernio16 networks or depth on X
Zernio is Late renamed, and it posts to 16 networks with per-account pricing that starts free. OpenTweet posts to three, which are X, Bluesky, and LinkedIn, and spends all of its surface area on X: threads in one call, X Articles, an evergreen queue, automation connectors, and a 43-tool MCP server. If you need Instagram or TikTok, stop reading and use Zernio.
7-day free trial. No X developer account needed.
Late is now Zernio
If you arrived looking for Late or getlate.dev, you are in the right place. As of September 2026 getlate.dev permanently redirects to zernio.com. The vendor's rebrand page says the API routes, parameters, response schemas, keys, and pricing are unchanged, and that the old SDK and CLI packages keep working for at least six months. The brand, the domain, the package names, and the environment variable names are what moved.The short answer
Zernio is a breadth product. One REST call reaches Instagram, TikTok, X, LinkedIn, Facebook, Threads, YouTube, Pinterest, Bluesky, Reddit, Snapchat, Discord, WhatsApp, Telegram, Slack, and Google Business, and its pricing page charges by connected account with the first two free. OpenTweet is a depth product. It reaches X, Bluesky, and LinkedIn only, and it uses that narrower scope to ship X features a unified API cannot express.
So the choice is not about which tool is better. It is about how many networks you actually publish to. Five or more, and Zernio is the cheaper and more complete answer. If X is where your audience is and Bluesky and LinkedIn are the extras, OpenTweet gives you more per post on the platform that matters.
Zernio vs OpenTweet, side by side
| Zernio (formerly Late) | OpenTweet | |
|---|---|---|
| What it is | Unified API for 16 networks plus ad networks | X, Bluesky and LinkedIn posting layer, deepest on X |
| Networks | 16, incl. Instagram, TikTok, YouTube, Facebook | 3: X, Bluesky, LinkedIn personal profile |
| Pricing model | Per connected account, nothing gated by plan | Flat plan: $11.99 / $29 / $49 per month |
| Free tier | Yes, first 2 accounts free, no card | No, 7-day free trial instead |
| X API usage cost | Passed through, $0.005 to $0.200 per request | Included in the flat price |
| REST API | Yes, zernio.com/api/v1, bearer auth | Yes, POST /api/v1/posts with a platforms array |
| MCP server | Yes, hosted at mcp.zernio.com/mcp | Yes, hosted at mcp.opentweet.io/mcp, 43 tools |
| CLI, n8n node, OpenClaw plugin | CLI package, renamed in the rebrand | @opentweet/cli, n8n community node, OpenClaw plugin |
| X threads in one call | Not listed | is_thread plus thread_tweets, one request |
| Long-form X Articles | Not listed | Create, schedule, publish via API and MCP |
| Evergreen recycling | Queue Posts for scheduling | Evergreen queue recycles proven posts |
| AI writing in your voice | Not listed on the features page | Built in, trained on your posted content |
| Automation connectors | Not listed | 5: RSS, GitHub, Stripe, SaaS pages, custom JSON |
| X DM campaigns | DMs API across 7 platforms | Discovery, AI drafts, human approval, drip send |
| Paid ads | Ads Manager across 7 ad networks | No |
| Visual calendar | Content Calendar, drag and drop | Visual calendar |
Zernio details taken from zernio.com's own pricing, features, and API pages in September 2026. "Not listed" means the capability does not appear on those pages, not that it is impossible. OpenTweet pricing is on the pricing page.
What the three-network limit really means
OpenTweet posts to X, Bluesky, and LinkedIn. That is the whole list. LinkedIn means the member's personal profile, not Company Pages. There is no Instagram, no TikTok, no Facebook, no YouTube, no Threads, and no plan to pretend otherwise. If a client brief includes Instagram Reels or TikTok, OpenTweet is the wrong tool and Zernio covers more ground for less money at low account counts.
The trade is what the narrow scope buys on X. A thread is one request instead of a chain of reply calls your code has to orchestrate and retry. Long-form X Articles are first class, with their own endpoints and MCP tools. The evergreen queue republishes posts that already earned engagement instead of letting them die after one impression cycle. AI generation writes in your voice because it learns from what you actually posted. Five automation connectors turn real events into posts: an RSS item, a GitHub release, a Stripe milestone, a change on a SaaS page, or a custom JSON payload you send yourself. And the analytics are X-native, covering top posts, best times, and profile growth.
Cross-posting still works the way you would expect. One post object carries a platforms array, and each target reports its own send status. The details are on the cross-posting feature page and in the cross-posting docs.
Pricing works differently, not just at a different number
Zernio does not sell tiers. Its pricing page bills per connected social account: the first 2 are free with no credit card, accounts 3 through 10 are $6 per month each, accounts 11 through 100 are $3 per month each, and anything past 100 is $1 per month each. It states that every feature is on every account with nothing gated behind a plan. Messages are metered on top, with the first 10,000 per month free and $1 per 10,000 after that. X API usage is passed through at $0.005 to $0.200 per request.
OpenTweet sells three flat plans: Pro at $11.99 per month, Advanced at $29, and Agency at $49, each with a 7-day free trial and no free plan. The plan sets how many accounts per network you get, which is 1, 3, and 10 respectively, and everything else is bundled, including the X API cost. That last line is the one worth modelling. On Zernio, a link post on X bills at the high end of the pass-through range, so a link-heavy publishing agent has a variable bill. On OpenTweet the bill does not move.
Shopping breadth more broadly? We also compared two other multi-network posting APIs in Ayrshare vs Blotato.
The developer and agent surface
Both products are API first and both run a hosted MCP server. OpenTweet adds three more entry points, all on the same key.
Hosted MCP server
Point any MCP client at https://mcp.opentweet.io/mcp with a bearer header. 43 tools, nothing to run locally.
REST API on every plan
One endpoint creates, schedules, and publishes. POST /api/v1/posts takes a platforms array for X, Bluesky, and LinkedIn.
CLI for CI
npm i -g @opentweet/cli, then opentweet tweet "..." --now. Set OPENTWEET_API_KEY in your pipeline.
n8n node and OpenClaw plugin
Wire posting into an existing automation graph or an agent runtime without writing HTTP calls.
Start from the social media API for AI agents page if you are wiring this into an agent loop.
One request, three networks, or a whole thread
The platforms array fans one post out to X, Bluesky, and LinkedIn. The thread fields are the part a unified 16-network API has no shape for.
curl -X POST https://opentweet.io/api/v1/posts \
-H "Authorization: Bearer ot_your_key" \
-H "Content-Type: application/json" \
-d '{
"text": "We cut our CI time from 22 minutes to 6.",
"platforms": ["x", "bluesky", "linkedin"],
"scheduled_date": "2026-10-02T14:00:00Z"
}'A full X thread is still one call.
curl -X POST https://opentweet.io/api/v1/posts \
-H "Authorization: Bearer ot_your_key" \
-H "Content-Type: application/json" \
-d '{
"text": "How we cut CI from 22 minutes to 6. A thread:",
"is_thread": true,
"thread_tweets": [
"1. We cached the dependency install. That saved 8 minutes.",
"2. We split the test suite across 4 parallel jobs.",
"3. We stopped rebuilding Docker layers that never change."
]
}'Or hand the whole workflow to an agent.
{
"mcpServers": {
"opentweet": {
"type": "streamable-http",
"url": "https://mcp.opentweet.io/mcp",
"headers": { "Authorization": "Bearer ot_your_key" }
}
}
}Get your key first
Create an API key with the ot_ prefix at https://opentweet.io/developer, verify it with GET /me, then send your first post. The same key works for the REST API, the MCP server, the CLI, and the n8n node.Which one is right for you
Pick Zernio if
- You publish to Instagram, TikTok, YouTube, Facebook, Threads, or Reddit
- You want to start at zero: the first 2 accounts are free with no card
- You manage many accounts and per-account pricing beats a flat plan
- You need DMs across several networks, or paid ads from the same API
- You are already on Late and want the path of least change
Pick OpenTweet if
- X is the platform that matters, with Bluesky and LinkedIn alongside
- You want threads, X Articles, evergreen recycling, and X-native analytics
- You want AI that writes in your voice, not just a scheduling endpoint
- You want RSS, GitHub, Stripe, SaaS page, or custom JSON events to post for you
- You want one predictable bill with X API costs already inside it
Frequently asked questions
Is Zernio the same product as Late?
Yes. Late, which lived at getlate.dev, renamed itself Zernio and moved to zernio.com. As of September 2026 getlate.dev returns a 301 redirect to zernio.com, and the vendor says every API route, parameter, and response schema is identical, existing API keys and OAuth tokens still work, and the old SDK and CLI packages keep working for at least six months. What changed is the brand: the domain, the package names, and the environment variable names.
How many networks does Zernio post to, and how many does OpenTweet post to?
Zernio lists 16: Instagram, TikTok, X, LinkedIn, Facebook, Threads, YouTube, Pinterest, Bluesky, Reddit, Snapchat, Discord, WhatsApp, Telegram, Slack, and Google Business. OpenTweet posts to three: X, Bluesky, and LinkedIn, where LinkedIn means the member's personal profile and not Company Pages. If you need Instagram, TikTok, YouTube, Facebook, or Threads, OpenTweet cannot do it and Zernio can. That is the honest dividing line.
How does Zernio pricing work?
Zernio prices per connected social account rather than by plan tier. Its pricing page lists the first 2 accounts free with no credit card, then $6 per month for each account from 3 to 10, $3 per month for each account from 11 to 100, and $1 per month for each account past 100. It states that every feature is available on every account with nothing gated behind a plan. Messages are metered separately, with the first 10,000 per month free and $1 per 10,000 after that, and X API usage is passed through at $0.005 to $0.200 per request.
Does Zernio have an API and an MCP server?
Yes to both. Zernio is a REST API first: the base URL is https://zernio.com/api/v1 and requests authenticate with an Authorization Bearer header. It also runs a hosted MCP server at https://mcp.zernio.com/mcp that exposes the same capabilities as MCP tools. OpenTweet has the same two surfaces, plus a CLI, an n8n community node, and an OpenClaw plugin.
Is OpenTweet cheaper than Zernio?
It depends entirely on account count. Zernio is free for 2 accounts, so at small scale it costs less than OpenTweet's $11.99 per month Pro plan, which has a 7-day trial and no free tier. Zernio also bills X API usage as a pass-through at $0.005 to $0.200 per request, while OpenTweet absorbs that cost in the flat price. If you post to X with links, which is where the $0.200 rate applies, the flat fee gets predictable fast.
What can OpenTweet do on X that a 16-network API cannot?
A unified multi-network API has to reduce every platform to what they all share, which is a caption and some media. OpenTweet is shaped around X instead: a thread is one POST to /api/v1/posts with is_thread and a thread_tweets array, long-form X Articles have their own endpoints and MCP tools, the evergreen queue recycles proven posts on a schedule, and analytics answer X questions like which posts worked and when your audience is on. There are also five automation connectors, which are RSS, GitHub, Stripe, SaaS pages, and custom JSON.
Do I need an X developer account to use OpenTweet?
No. You connect your X account with a normal login and OpenTweet manages the OAuth tokens and refresh. Bluesky connects over atproto OAuth, so there is no App Password to generate. LinkedIn sign-ins last 60 days, after which you reconnect the account once from settings.
Keep exploring
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Ayrshare vs Blotato
Two other multi-network posting APIs compared, if breadth is what you are shopping for.
Cross-posting on OpenTweet
One post, sent to X, Bluesky, and LinkedIn, with per-platform status reporting.
Narrow on purpose. Deep where it counts.
Connect X, get your key, and give your agent threads, articles, evergreen, and analytics today.