The Zernio Alternative With Predictable Pricing
Both are developer APIs for social media publishing and engagement — covering DMs and comments. Zernio also adds ads management. Postproxy goes deeper on the publishing side: predictable per-group billing, scoped API keys, and a 99.95% uptime SLA.
TL;DR
A quick take in two columns, then the detailed comparison below.
15+ platforms — including WhatsApp, Telegram, Discord, Snapchat, and Reddit — plus ads management across 6 networks and a DM and comment inbox. Pricing is per connected social account: graduated tiers starting at $6/account/mo. Every account a user connects is a billable line item. Free tier: 2 accounts with unlimited posts.
Publishing and engagement API. Covers the full cycle: scheduling, publishing, reading and replying to DMs and comments. Pricing is per profile group — not per connected account. Scale ($99/mo) covers 50 groups × up to 11 platforms = up to 550 connected accounts for a flat fee. Your bill doesn't change when a client adds more platforms. Scoped API keys give true per-client data isolation. 99.95% uptime SLA vs Zernio's 99.7%+. Free tier: 10 posts/month, no credit card required.
Side by side
A full breakdown of capabilities, integrations, and API design.
| Zernio | Postproxy | |
|---|---|---|
| Platforms | 15+ (incl. WhatsApp, Discord, Snapchat, Reddit) | 11 (expanding) |
| Pricing model | Per connected social account (graduated) | Per profile group — flat per tier |
| Cost scales with account growth | Yes — every new account adds to bill | No — adding accounts to a group is free |
| Free tier | 2 accounts, unlimited posts | 10 posts/mo, 2 profile groups, permanent |
| Uptime SLA | 99.7%+ | 99.95% |
| Multi-tenant isolation | Shared API key + profile_id parameter | Scoped API keys (per-client) |
| Ads API | Yes (6 networks: Meta, Google, TikTok, LinkedIn, Pinterest, X) | No |
| DM / comment inbox | Yes (read and reply) | Yes (read and reply) |
| SDKs | 8 (Node, Python, Go, Ruby, Java, PHP, .NET, Rust) | 7 (Node/TS, Python, Go, Ruby, PHP, Java, .NET) |
| Queue system | Recurring slots (minimal docs) | Slots, jitter, priority |
| Publish lifecycle | Partial status + manual retry | State machine (draft → pending → published → failed → retry) |
| n8n | Yes (official node) | Yes (official node) |
| Make.com | Yes (20+ modules) | Yes |
| Zapier | Yes | Yes |
| MCP server | Yes | Yes |
| BYOK | Not available | Yes (X / Twitter) |
Pricing at scale
Zernio charges per connected social account. Postproxy charges per profile group — the same plan covers whether your clients use 1 platform or all 11.
| Scenario | Zernio | Postproxy | Savings |
|---|---|---|---|
| 10 profile groups, ~30 accounts | ~$108/mo | $17/mo (Build) | 84% |
| 50 profile groups, ~150 accounts | ~$368/mo | $99/mo (Scale) | 73% |
| 50 profile groups, 550 accounts (max) | ~$768/mo | $99/mo (Scale) | 87% |
| Enterprise (100+ groups) | Grows per account | $699/mo flat | Fixed |
The middle two rows use the same Postproxy plan ($99/mo). One has 150 accounts, the other 550. Your bill doesn't move. On Zernio, the same growth adds about $400/mo (~$368/mo at 150 connected accounts vs ~$768/mo at 550).
Where Postproxy wins
APIs, SDKs, tenant isolation, and predictable behavior—without running publishing infrastructure yourself.
Bill doesn't grow with accounts
A client on 1 platform and a client on 11 cost the same profile group. When your users grow their social presence, your infrastructure cost stays flat.
Safe during trial spikes
Per-account billing means a viral signup day — users connecting accounts and churning — can generate hundreds of dollars in unexpected charges. Profile-group pricing caps your exposure at the plan you chose.
Scoped API keys
Each client gets a key that can only see their own data. Zernio routes everything through a shared key with profile_id as a parameter — a leaked key exposes all your clients.
Higher uptime SLA
99.95% uptime commitment vs Zernio's 99.7%+. At publishing scale, the difference between 99.7% and 99.95% is meaningful for the reliability guarantees you can offer your customers.
Explicit failure handling
Full state machine: draft → pending → published → failed → failed_waiting_for_retry. Automated pipelines know exactly what happened and when. Zernio offers manual retry via CLI only.
Queue system
Time slots with jitter and priority levels for high-volume publishing. Zernio has recurring slots but minimal documentation on queue behavior.
Where Zernio is different
15+ platforms
Includes WhatsApp, Discord, Snapchat, and Reddit — platforms Postproxy doesn't cover yet. If your product needs WhatsApp or Discord messaging, Zernio is the only developer API that reaches them.
Ads API
Zernio offers unified ad campaign management across Meta, Google, TikTok, LinkedIn, Pinterest, and X. If paid social campaign management is part of your product, Zernio covers it through a single API.
Which one to use
Different tools solve different problems. Here's how to pick the right one.
Choose Zernio if:
- Your product needs WhatsApp, Discord, Snapchat, or Reddit
- You're building paid social campaign management (ads API)
Choose Postproxy if:
- You're building a publishing SaaS with multiple clients
- You need predictable billing that doesn't scale with users' account count
- You need per-client data isolation at the API key level
- Your SLA requirements demand 99.95% uptime
- You need automated retry and explicit failure states in your pipeline
Try Postproxy free
10 posts/month, all platforms, no credit card. Upgrade when you need more.
