Should an AI agent reply in WhatsApp groups?
Most businesses meet WhatsApp groups sooner or later: a parents' group for a tutoring class, a team group with the lads on site, a group a wedding couple set up with their planner. An AI agent can read and reply in groups, but a group is a very different room from a one-to-one chat. Everyone sees every message, nobody asked for a robot to join in, and a careless reply lands in front of dozens of people at once. This guide explains when an agent should speak in a group, when it should stay quiet, and the limits Spaces applies.
How a group is different from a one-to-one chat
In a one-to-one chat, a customer wrote to you and expects an answer from you. In a group, the people there may not have come for your business at all. They might be there for the class, the event or the team, and your number is one voice among many.
| One-to-one chat | Group | |
|---|---|---|
| Who sees the reply | One person. | Everyone in the group, including people who never spoke to you. |
| Who started it | Usually the customer. | Whoever made the group, which may or may not be you. |
| What people expect | An answer to their question. | A conversation between people. Long automatic answers feel out of place. |
| What a mistake costs | One awkward message to fix. | A public mistake, and possibly people leaving or reporting the group. |
That is why the safest starting point is simple. Let your AI agent work in one-to-one chats, and treat groups as places where it only speaks when it is plainly asked to.
The kinds of groups businesses end up in
| Group | Typical example | Should the agent reply? |
|---|---|---|
| A group you run for customers | A class group for a yoga studio, a parents' group for a tutor. | Only to direct questions it can answer from your notes, such as times or what to bring. Leave chat between members alone. |
| A group a customer made with you in it | A couple, their families and the wedding planner. | Rarely. These are personal. Let the agent draft and a person send. |
| A team or supplier group | The site team, a supplier's order group. | No. Keep the agent out unless you have set it up for one clear job. |
| A local or trade group | A neighbourhood group, a trade association. | No. Promoting yourself in other people's groups is how numbers get reported. |
What Spaces does and does not do in groups
If your number is in groups, your agent may see those conversations alongside your one-to-one chats. Spaces applies the same care to groups as everywhere else, plus a few rules of its own.
- Spaces never adds people to groups, mentions at most 3 people in a message and forwards at most 3 messages an hour and 5 a day. Group messages count toward the daily limits.
- When few people answer new chats, Spaces halves new chats, and pauses them if hardly anyone answers. Replies still go out.
- The same or nearly the same message goes to at most 2 new people a day, so your agent writes each first message for the person it is going to.
The first of these is the one that matters most. Adding people to a group without asking is one of the quickest ways to get a number reported, because it puts strangers in a conversation they did not choose. Spaces will not do it for your agent, whatever the agent asks. If you want someone in a group, invite them yourself in the app, or send them the group's invite link in a one-to-one chat they started.
When an agent should speak in a group
There are a few situations where an agent reply in a group is genuinely helpful. In each one, someone has asked a direct question that has a factual answer.
- Someone asks the business a direct question, such as "what time does Saturday's class start?", and the answer is in your notes.
- Someone mentions your number and asks for something simple, such as the address or a link you have already shared.
- You run the group and want the agent to post one agreed message, such as a reminder you wrote and approved.
Even then, short is better. One or two sentences in a group reads as a helpful reply. A long, neat paragraph with bullet points reads as a machine talking over people.
When it should stay quiet
- Members are chatting to each other. Not every message needs a reply, and most do not need one from the business.
- The question is personal: a payment, a complaint, a health matter, a child's progress. Answer that in a one-to-one chat, never in front of everyone.
- The message is a joke, a thank you, a photo or an emoji. A person might react; an agent should not.
- Two people disagree. Anything that sounds like taking sides belongs to a person.
- The group is not yours and nobody has asked the business anything.
Example: a question in a class group
| Who | Message |
|---|---|
| Member (Hannah) | Is the Saturday class still on with the bank holiday? |
| AI agent | Hi Hannah, yes, Saturday's class runs as normal at 9:30. |
| Member (Leo) | Great, can I pay for the next block here? |
| AI agent | Hi Leo, could you send us a direct message about that? Then we can sort the payment privately. |
| Leo (one-to-one, to the business) | Hi, it's Leo from the Saturday class, about the next block |
| AI agent (one-to-one) | Hi Leo, thanks. The next six-week block is £72. Would you like Jess to send you the payment link? |
Names and details are examples.
The agent answers the factual question in one line, then moves the money question to a private chat that Leo starts himself. That matters on WhatsApp. Through Spaces, a new chat only goes to someone who has messaged your number before or whom you marked as opted in, so asking the member to write first keeps everything inside the rules and keeps their details out of the group. If Leo does not write, the agent tags the conversation and a person picks it up.
Group messages and your daily limits
Group messages count toward the same daily limits as everything else on the number. Messages are at least 10 seconds apart, up to 400 a day. That is plenty for normal use, but a chatty agent in a busy group can use up a surprising share of the day.
| Action | Spaces limit per account |
|---|---|
| Messages | Up to 400 a day, at least 10 seconds apart |
| New chats | 5 an hour, 10 a day |
When a limit is reached, your agent is told and waits, rather than trying again and again.
| What your agent is told | What it means | What to do |
|---|---|---|
| RATE_LIMITED | The account reached its hourly limit, or a message came too soon after the last one. | Nothing. Your agent waits the time Spaces gives it and tries again with the same message. |
| DAILY_CAP | The account reached its daily limit, or this AI agent used the daily share you gave it. | Sending starts again over the next day. To give the agent more, raise its daily share under Your agent. |
Mentions and forwards are kept low too. Spaces mentions at most three people in a message and limits forwards, so an agent cannot tag half the group or pass messages around in bulk.
Running a group of your own well
If you run a group for customers, a little set-up makes life easier for you and the agent.
- Put the basics in the group description: what the group is for, the hours someone answers and where to send private questions.
- Consider making it an announcement-style group, where only admins post, if it is mainly for updates. Members can still message you one to one.
- Ask before adding anyone. Share the invite link with people who ask to join, rather than adding numbers yourself.
- Tell members that some replies come from an AI agent. Our guide on telling customers they are talking to AI covers how.
- Give the agent one clear job in the group, such as answering questions about times and venues, and nothing else.
Common mistakes to avoid
- Letting the agent reply to every message in a group, so members feel watched.
- Answering private questions publicly, such as how much someone owes.
- Posting the same promotion in several groups. Spaces refuses near-identical messages to many new people, and members report this kind of thing.
- Adding customers to a group without asking first.
- Forgetting that group messages use the same daily allowance as your one-to-one replies.
Notes to give your AI agent
WhatsApp groups:
- In groups, only reply when someone asks the business a direct question that the facts below answer.
- Keep group replies to one or two sentences. No lists.
- Never discuss payments, complaints, health or anyone's personal details in a group. Say a person will be in touch, and tag the chat "follow up".
- Do not reply to thanks, jokes, photos or emojis in groups.
- Never post promotions in groups.
- In the team group and any group we do not run, do not reply at all.
- If Spaces says to wait, wait.Who you message
Summing up
An AI agent can be useful in a WhatsApp group, but only in a narrow way: short, factual answers to direct questions in groups you run, and silence everywhere else. Keep personal matters in one-to-one chats, never add people without asking, and remember that group messages count toward the same limits. If in doubt, let the agent tag the chat and leave the reply to a person.
Pricing
FAQ
Can an AI agent read WhatsApp group messages?
If your number is in a group, your agent may see that conversation alongside your one-to-one chats. Whether it replies is up to the notes you give it. Most businesses tell it to stay quiet in groups unless asked a direct question.
Can Spaces add customers to a WhatsApp group?
No. Spaces never adds people to groups, because adding people without asking is a common reason numbers get reported. Invite people yourself, or send the invite link to someone who asked to join.
Do group messages count toward my limits?
Yes. Group messages count toward the same daily limits as everything else on the number, up to 400 messages a day and at least 10 seconds apart.
Should my agent answer payment questions in a group?
No. Move anything personal, such as money, complaints or health, to a one-to-one chat or hand it to a person. In the group, the agent can say someone will be in touch.
Can my agent mention everyone in a group?
No. Spaces mentions at most three people in a message, so an agent cannot tag a whole group. That is deliberate, because mass mentions feel like spam to members.
Is it a good idea to post offers in local WhatsApp groups?
Not through an AI agent, and usually not at all unless the group's admin has invited it. Near-identical messages to many people are refused by Spaces and are exactly what members report.
Can I keep the agent out of one group but not another?
Yes, through its notes. Name the groups it should never reply in, such as your team group, and the ones where it may answer direct questions. You can also hand a conversation to a person so the agent stays out of it.
What if the agent says something wrong in a group?
Correct it quickly in the group yourself, in a short, friendly message. If you want to check group replies first, ask your agent to hold replies as drafts, and nothing goes out until you approve it.