The Unipile alternative for AI agents that answer customers, not products that embed an inbox

Unipile is a strong choice if you are a software company putting your users' LinkedIn, WhatsApp, email and calendar inside your own product. You get one schema, hosted sign-in for your users, webhooks and a low price per linked account. You write the app, and you decide how often it sends.

Spaces is for a different job: letting an AI agent (Claude, Grok, ChatGPT, Cursor or your own code) answer the people who message a business on Instagram, WhatsApp, LinkedIn and Messenger, with the safety rules already built in. You don't build a product around it. You connect the agent, and it starts working in the chats.

Every Unipile fact on this page comes from Unipile's own site, checked on 11 November 2026. Unipile costs less per account, and we say that plainly below.

Two different products, one sentence each

• Unipile is "a unified API that lets software publishers connect their users' own messaging, email and calendar accounts to their product through one contract": LinkedIn, WhatsApp, Instagram and Telegram messaging, Gmail, Outlook and IMAP email, and Google and Outlook calendars, with hosted authentication, webhooks and an MCP server. (Unipile llms.txt, Unipile pricing)
• Spaces is messaging infrastructure for AI agents: one REST API and one MCP server that let the agent you already use read and reply to customer conversations on the Instagram, WhatsApp, LinkedIn and Messenger accounts a business already has, inside each platform's limits. (Spaces pricing, llms.txt)

The short version: Unipile is the API layer you build a product on. Spaces is the channel layer you plug an agent into. Unipile's own MCP page says it best: "MCP to Build, REST to Run". Spaces' MCP is the thing your agent runs on, every day, in live conversations.

Spaces vs Unipile, head to head

Price assumption: an agent builder or small agency running 10 chat accounts, for example a WhatsApp number and an Instagram profile for each of five clients. Spaces counts one Instagram profile, WhatsApp number, LinkedIn profile or Facebook account as one account. Unipile counts one LinkedIn profile, WhatsApp number, Instagram account, Telegram account or mailbox as one linked account, and bills on the peak number linked at once in each 30-day period. Prices exclude tax and VAT and come from spacesos.com/pricing and unipile.com/pricing-api (USD column), checked 11 November 2026. At 10 accounts Unipile is cheaper ($55 against $90), and its API calls are unlimited, while Spaces charges $5 per 1,000 actions over the pooled allowance. At 5 accounts Spaces is cheaper ($45 against Unipile's $55 minimum). The break-even is 7 accounts. The difference in what you get is the difference between a raw API you build on and a service that also enforces limits, warms accounts up and gives your agent its runtime tools. Neither price includes what your own AI agent costs to run.

Where the difference shows up

1. Who the customer is

Unipile is plain about its audience: "software publishers" building "CRM, ATS, sales-engagement and AI-agent products that need their customers' accounts inside their own application". It also says what it isn't: "not an operator dashboard or an outreach tool. It is the API layer that products are built on." (Unipile llms.txt)

Spaces is for the person whose agent does the talking: a business owner who wants Claude or Grok answering Instagram DMs, a developer running an agent for clients, or a team adding WhatsApp and LinkedIn to an agent it already has. Paste "Set up Spaces for me by following https://www.spacesos.com/agents" into the agent and it creates the account with an emailed code, connects https://api.spacesos.com/mcp, writes a short business brief and sends one connect link per channel. (llms.txt, agent setup guides)

If you are shipping a SaaS product that thousands of your users will sign into, Unipile's white-label Hosted Auth is built for that. If you just want your agent working in the chats this week, Spaces skips the product-building step.

2. Two MCP servers, two different moments

Unipile's MCP page calls it the "Unipile MCP Server for AI coding agents": Codex, Cursor, Claude Code or Gemini CLI "read the Unipile API and build LinkedIn, WhatsApp and email integrations into your app", with "every call … tested on your Development application first". Its AI-agent page sums it up as "MCP to Build, REST to Run": "In production, your AI agent calls the Unipile REST API and wakes up on webhooks." (Unipile MCP, Unipile for AI agents)

Spaces' MCP is the production surface. Your agent lists the inbox, reads messages and attachments, replies in the chat, schedules a message for a local time, runs routines (a new message, a keyword, no reply after N hours) and calls wait_for_events to hear about new messages without polling the platform. There are also single-channel servers (/mcp/instagram, /mcp/whatsapp, /mcp/linkedin, /mcp/messenger) when an agent should only see one channel. (llms.txt)

So with Unipile, your coding agent writes an integration and then your own code runs it. With Spaces, your agent is already the integration.

3. Who decides how much an account sends

Unipile leaves sending volume to you: "Unipile applies no limit of its own on how many messages or events a customer sends or receives. Each provider enforces its own rate limits." Its llms.txt adds that "customers stay responsible for the volume, content and targeting of what they send. Cadence is a customer-side decision." It also advertises "built-in proxy rotation and quota management to keep connected accounts safe and stable". (Unipile llms.txt, Unipile pricing)

Spaces makes those decisions on every key, so an agent can't talk itself past them:

• Warm-up. Every new or reconnected account ramps up over four weeks. For up to 24 hours after a WhatsApp account connects, reconnects, or is disconnected and connected again, Spaces does not start new chats or outreach. Replies in chats that already exist still go out. Other channels have no reply-only window: the warm-up limits apply from the first day, and replies to people who wrote in go out immediately.
• Pacing. On Instagram, at least 15 seconds between messages. On LinkedIn, 20 seconds, and invitations at least 90 seconds apart.
• Daily limits by channel and plan. For example, LinkedIn invitations on a free account are capped at 30 a day and 150 a week. Instagram new chats, likes, comments and follows share a budget of 100 a day.
• Replies are never held back. A reply to someone who wrote in has no daily limit. Only the gap between messages applies.
• No blasts. The same cold text can't go to many people, and "stop" ends messages to that person.

(llms.txt, sending limits)

Honest caveat: neither approach can promise the platform won't restrict an account. Unipile says it "does not publish an account-ban rate". Spaces says its limits "reduce ban risk" and "cannot guarantee" against restriction. What changes is who has to build and maintain the guardrails. (Unipile llms.txt, account safety)

4. A person can stop the agent

An agent that sends messages from a real person's account needs an off switch. In Spaces, pause_all_sending stops every send, post, comment, invitation, scheduled message and routine at once while reads keep working. With approvals on (or a draft-only key), each reply waits as pending until a person approves it. Read-only keys and per-key revocation are on every plan. (llms.txt, pricing)

Unipile gives you scoped API keys and lets each account owner disconnect. Any approval step or kill switch is something you build in your own product. (Unipile MCP, Unipile llms.txt)

5. Channel coverage: Unipile is wider, Spaces has Messenger

Unipile covers more ground: Telegram, Gmail, Outlook, IMAP and two calendars on top of LinkedIn, WhatsApp and Instagram, all at the same price per account. A Gmail or Outlook connection counts as one account for both email and calendar. If your product needs inbox and calendar sync, Spaces is not a substitute. (Unipile pricing)

Spaces focuses on the four places customers start conversations with businesses: Instagram, WhatsApp, LinkedIn and Messenger. TikTok posts and comments are live. Facebook Pages is coming soon. Unipile's pricing page lists Messenger under "Coming soon". On Instagram, Spaces offers an official sign-in for Business and Creator accounts (no warm-up, a normal pace, replies within 24 hours of the person's last message) or full access for any account. Unipile says it reaches LinkedIn, WhatsApp and Instagram "by reverse engineering", on accounts each user connects. (llms.txt, Unipile llms.txt)

6. Pricing that matches the work

Unipile's price is simple and low: $55 (€49) a month for up to 10 linked accounts, then $5.50 per account for 11–50, $5.00 for 51–200, and down to $3.50 from 5,001. API calls are unlimited, and there's no fee per message or per request. (Unipile pricing)

Spaces is free for 1 account and 50 actions a day, with no card. Pay as you go is $9 per connected account a month, prorated, with 1,000 actions a month per account pooled, then $5 per 1,000 actions ($4 above 100,000 extra, $3 above 1,000,000). Reading messages is always free. Every plan includes the REST API and the MCP server. (Spaces pricing)

Up to 6 accounts, Spaces costs less than Unipile's $55 minimum. From 7 accounts up, Unipile is cheaper per account, and the gap widens with volume.

If you're building at volume and you have the engineers to own limits, approvals and an agent runtime, Unipile is the cheaper base layer. If you'd rather not build those, Spaces' price includes them.

Choose Spaces if

• Your AI agent (in Claude, Grok, ChatGPT, Cursor or your own code) needs to answer customers on Instagram, WhatsApp, LinkedIn or Messenger, and you don't want to build a product around it first.
• You want the MCP server your agent uses in production, not just while it writes code.
• You want sending limits, pacing and a four-week warm-up enforced for you, on every key.
• You want a pause switch, read-only or draft-only keys, and optional human approval of every send.
• You need Messenger now, or an official Instagram sign-in for a Business or Creator account.

Stay with Unipile if

• You're a software company embedding your users' accounts in your own CRM, ATS, outreach tool or agent product, with white-label Hosted Auth.
• You need email and calendar (Gmail, Outlook, IMAP, Google and Outlook calendars) or Telegram in the same API.
• You need LinkedIn hiring features (job posts, applicants, pipelines) or a raw route for LinkedIn features without a dedicated endpoint.
• You want the lowest price per account at volume: $55 a month covers up to 10, against $90 for 10 accounts on Spaces.
• You'd rather set limits and cadence yourself than have a vendor enforce them.

Some teams will reasonably use both: Unipile under a product they sell, and Spaces for an agent that answers their own business's DMs.

Other alternatives to consider

• Zernio is a usage-based API for social posting, messaging, ads, phone numbers, SMS and WhatsApp, with an MCP server. On its pricing page, accounts 1–2 are free, accounts 3–10 are $6 a month each, 11–100 are $3, and 101+ are $1. Reading and sending DMs is included, with the first 10,000 sent each month free and metered after that. At 10 accounts, that's $48 a month. (zernio.com/pricing, checked 11 Nov 2026) · Spaces vs Zernio
• Ayrshare is a social media API for products, billed by "social profile" (one customer, brand or location, across any number of networks), with comments and DMs moderation, an MCP server and a WhatsApp messaging API. Premium is $149 a month (1 profile), Launch $299 (up to 10 profiles, 28-day free trial), and Business from $599 (30 profiles), all billed monthly. Yearly billing saves 17%. (ayrshare.com/pricing, checked 11 Nov 2026)

FAQ

What is Unipile?
A unified communications API for software publishers. It lets a product connect its users' own LinkedIn, WhatsApp, Instagram, Telegram, email and calendar accounts, then read and send from them through one schema. (Unipile llms.txt)

How much does Unipile cost?
On 11 November 2026: $55 (€49) a month for up to 10 linked accounts, then $5.50 (€5.00) per account for 11–50, falling to $3.50 (€3.00) from 5,001. API calls are unlimited, prices exclude VAT, billing is post-paid every 30 days on the peak number of linked accounts, and there's a 7-day free trial with no card. (Unipile pricing)

Does Unipile have an MCP server?
Yes. Unipile runs a hosted MCP server that its site describes as being for AI coding agents (Cursor, Claude Code, Codex, Gemini CLI) to read the API and build integrations, tested on a Development application. In production, Unipile says your agent calls its REST API and listens for webhooks. (Unipile MCP, Unipile for AI agents)

Is Spaces cheaper than Unipile?
Up to 6 accounts, yes: 5 accounts are $45 a month on Spaces against Unipile's $55 minimum. From 7 accounts up, no: at 10 accounts Unipile is $55 a month and Spaces is $90. Spaces' price includes enforced limits, warm-up, pacing, approvals and a runtime MCP server for your agent. Your agent's own running costs are separate from both.

How much does Spaces cost?
Free to start: $0 for 1 account and 50 actions a day, no card. Then Pay as you go at $9 per connected account a month, with 1,000 actions a month per account, then $5 per 1,000. Reading messages is always free. (Spaces pricing)

Does Spaces have a free plan?
Yes. The Free plan is $0 forever with no card: 1 connected account and 50 actions a day. An Instagram account on the official connection does not count toward the 1 account. (Spaces pricing)

Does Spaces support email, Telegram or calendars like Unipile?
Not for new accounts. Spaces' live channels are Instagram, WhatsApp, LinkedIn and Messenger for messages, plus TikTok for posts and comments (not DMs), with Facebook Pages coming soon. Email and other legacy channels keep working only for accounts that already had them. (llms.txt)

Does Unipile support Messenger?
Unipile's pricing page lists Messenger (and X) under "Coming soon", and its llms.txt says neither is released yet. Unipile also has a Facebook and Messenger product page marked "New", so check with Unipile for the current status. (Unipile pricing, Unipile llms.txt)

Will connecting an AI agent get my account restricted?
Platforms restrict automation. Spaces keeps each account inside daily limits, paces messages and warms new accounts up over four weeks. That lowers the risk, but it can't remove it. See sending limits and account safety.

Should I replace Unipile with Spaces?
Only if you're using Unipile to give an agent chat channels and would rather not build the limits, approvals and runtime yourself. If you're embedding accounts in a product you sell, or you need email and calendar, keep Unipile.

Facts about Unipile, Zernio and Ayrshare come from their own websites, checked on 11 November 2026. Prices and features change, so check their sites for the current version. Product names are trademarks of their owners.

Sources

Facts on this page were checked on 11 November 2026 from the official product pages linked in the text, and from Spaces pricing.