Head to head
PostOnce (postonce.app) vs Zernio
Last updated 15 October 2026
Flat-euro multi-network scheduler for local businesses and solo operators, with recurring posts and media tools.
- From
- €12a month, billed yearly
- Free scheduling
- No
Developer-oriented scheduling and publishing API with a calendar, queues, MCP and per-connected-account pricing.
- From
- Free
- Free scheduling
- Yes
Bottom line
PostOnce (postonce.app) is the pick for local businesses publishing to several networks. Zernio fits developers building social publishing into an app better, and it's the only one of the two with a free scheduling plan.
A verified price comparison requires the same billing term, currency and eligible workload. See each pricing section for the published terms.
Key differences
Where the two actually diverge, before the full tables.
- Zernio has a free scheduling plan; PostOnce (postonce.app) doesn't.
- PostOnce (postonce.app) posts to 9 networks, Zernio to 15.
Features compared
| Feature | PostOnce (postonce.app) | Zernio |
|---|---|---|
| AI captions | Not assessed | Not assessed |
| Basic analytics | Yes | Not assessed |
| Advanced reports | Not assessed | Not assessed |
| Bulk upload | Not assessed | Not assessed |
| Evergreen recycling | Yes | Not assessed |
| Team roles | Not assessed | Not assessed |
| Approvals | Not assessed | Not assessed |
| Link in bio | Not assessed | Not assessed |
Platforms compared
| Network | PostOnce (postonce.app) | Zernio |
|---|---|---|
| Auto | Auto | |
| Auto | Auto | |
| X (Twitter) | Auto | Auto |
| Auto | Auto | |
| TikTok | Auto | Auto |
| Auto | Auto | |
| YouTube | Auto | Auto |
| Threads | Auto | Auto |
| Bluesky | Auto | Auto |
| Google Business | Not assessed | Auto |
| Not assessed | Auto | |
| Snapchat | Not assessed | Auto |
| Telegram | Not assessed | Auto |
| Discord | Not assessed | Auto |
| Not assessed | Auto |
Pricing
Prices use each tool’s billing unit. Annual equivalents are labeled as billed yearly; scaling rows show monthly costs and available annual rates.
No free plan.
- Lowest public entry price
- €12 a month, billed yearly
Whole-plan price; it doesn't scale per unit.
PostOnce (postonce.app)
Solo
€12 a month billed annually
- Seats
- 2
- Accounts
- 10
- Scheduled posts
- Unlimited
- Run by Lucro Limited and founded by Sven van Staden. This is separate from postonce.to. Instagram Stories are not supported.
- Published EUR prices include VAT.
- Pro €30/month or €300/year; unlimited accounts, 3 workspaces, 5 users.
- Entry annual bill: EUR144.
Zernio
Build
First 2 accounts free; 10-account example is $48/month; currency and full graduated rates unconfirmed
- X API usage billed separately
- Previously called Late. The official rebrand says the product and infrastructure are unchanged.
- The first two accounts are free. The current example charges $48/month for ten accounts. X API usage is charged separately.
- Usage-based per account; pricing example: 10 accounts = 2 free + 8 × $6 = $48/month. Graduated rates beyond 10 not verified. X API usage passed through separately.
- The checked vendor pages show a dollar symbol without an explicit currency code. Paid comparison amounts remain unverified.
- The scheduler also supports messaging destinations. Discord, WhatsApp and Telegram are messaging channels, rather than public social feeds.
Pros and cons
PostOnce (postonce.app)
- VAT-inclusive euro plans for small-business workflows; Pro offers API access and multi-workspace reporting.
- No public free plan or trial.
- Instagram Stories are not supported.
Zernio
- API-first infrastructure for builders, with social, messaging and blog surfaces; do not equate all supported surfaces to social feeds.
- X API usage costs extra.
- The full graduated pricing table and dollar currency need confirmation.
PostOnce (postonce.app) vs Zernio: FAQ
- Is PostOnce (postonce.app) or Zernio cheaper?
- A verified price comparison is unavailable for these configurations. Check the current billing term, currency, required capacity and plan features before comparing totals.
- Does PostOnce (postonce.app) or Zernio have a free plan?
- Zernio has a free plan; PostOnce (postonce.app) does not.
- Which is better, PostOnce (postonce.app) or Zernio?
- PostOnce (postonce.app) is the stronger pick for local businesses publishing to several networks, while Zernio is the better fit for developers building social publishing into an app. We don't score them; the right call comes down to how you post.