Zernio alternative

Zernio is the renamed Late (getlate.dev). Its docs describe one POST /v1/posts call that publishes to 16 platforms, and an API that covers 37 platforms in total across posting, messaging, comments and reviews, ads, telephony, blogs and commerce. Its platforms page lists 12 networks under social posting. It has official SDKs for Node.js, Python, Go, Ruby, Java, PHP, .NET and Rust, a hosted MCP server for Claude, ChatGPT, Codex and Cursor, a CLI and webhooks.

Of the products on our comparison pages, Zernio is the closest to us in shape: an API first, priced per account, built for apps whose users connect their own accounts. The difference is scope and what "account" means on the bill.

Read on zernio.com/pricing on 2026-11-01. There are no plans or seats; the rate stays $1 per account past 2,000 accounts, and Enterprise custom terms are available from there. Every feature is included.

• Accounts 1–2: free, no card. Accounts 3–10: $6/mo each. 11–100: $3 each. 101 and up: $1 each, no cap. The page shows 10 accounts at $48; by the same rate card, 100 accounts are $318 and 1,000 are $1,218.
• Unlimited posts, threads, first comments and queue access on every account.
• Messaging: received messages free; first 10,000 sent a month free, then $1 per 10,000.
• X API passed through at X's rates with no markup: posts $0.015, posts with a URL $0.200, reads $0.005.
• SMS from $0.008 per outbound US segment, plus 10DLC fees. Managed ads metered per active ad, first 500 free.

Requests go to https://zernio.com/api/v1 with Authorization: Bearer and a key starting sk_. The quickstart has three steps: create a profile (POST /v1/profiles, one per brand or per user of your app), get a connect URL with GET /v1/connect/{platform}?profileId=..., then POST /v1/posts with content, scheduledFor, timezone and a platforms array of entries with a platform and an accountId.

The create-post docs list an optional Idempotency-Key header (retries with the same key within 24 hours return the original post), a dryRun flag that applies to TikTok only, and 429 causes including a velocity limit of 25 posts per hour per account and daily platform limits.

Coverage and breadth. Zernio publishes to X, Instagram, Facebook, LinkedIn, TikTok, YouTube, Pinterest, Reddit, Threads and Google Business today. We publish to X, Bluesky, LinkedIn, Mastodon and Telegram, and the rest are coming. Zernio also has a unified inbox, comment and review management, managed ads, SMS, WhatsApp and iMessage, and SDKs in eight languages. If your product needs any of that, Zernio covers more than we do.

Zernio bills every connected account each month. We bill accounts that published that month. If every account posts, the two are close: at 25 accounts Zernio is $93 and we're $29; at 100, $318 against $79.

The gap opens when users connect and then post occasionally. Take an app with 1,000 connected accounts where 200 post in a given month: Zernio's rate card puts 1,000 accounts at $1,218; we'd bill the 200 active ones, $154 on Growth. The pricing page has a calculator.

Both pass X API costs through at cost. Ours comes with an included X credit on paid plans, and preflight warns with x_link_cost when a post contains a link, because X charges $0.200 for those against $0.015 for plain posts (see X API pricing).

Both are APIs, so the choice comes down to scope and billing. For per-profile pricing instead of per-account, compare Ayrshare and Upload-Post.

• You need messaging, comments, ads, SMS or an SDK in Go, Ruby, Java, PHP, .NET or Rust: Zernio.
• You need Instagram, TikTok, YouTube, Reddit or Google Business publishing now: Zernio.
• You publish only, and a large share of connected accounts don't post in a given month: us, because idle accounts are free.
• You want dry runs on every network, not only TikTok, and preflight errors that carry a fix: us.

We have no profile object. Tag connect links with external_ref instead (the profile id or your customer id), and filter with GET /v1/accounts?external_ref=.... GET /v1/connect/{platform} becomes POST /v1/connect-links, which returns a hosted URL valid for 7 days by default. A platforms array of {platform, accountId} becomes a flat accounts array of ids; content becomes text; mediaItems becomes media; scheduledFor plus timezone becomes one ISO-8601 scheduled_at with an offset. Idempotency-Key works the same way, and our dry_run runs preflight on every network, not only TikTok. Full field list in the docs.

# Zernio's platforms[].accountId becomes a flat accounts array
curl -X POST https://socialsforai.com/v1/posts \
  -H "Authorization: Bearer $SOCIALS_KEY" \
  -H "Idempotency-Key: launch-2026-11-03" \
  -H "Content-Type: application/json" \
  -d '{
    "accounts": ["acc_bluesky", "acc_linkedin"],
    "text": "We shipped v2. Notes: https://example.com/v2",
    "media": [{ "url": "https://example.com/v2.png", "type": "image", "alt": "v2 screenshot" }],
    "scheduled_at": "2026-11-03T15:00:00Z"
  }'