Asynchronous communication is a way of working together in which a message can be answered later, so nobody has to be available at the same moment it is sent. Email, shared documents and recorded updates are typical examples.
It is one of the working styles covered in the guide to productivity systems, and it shapes how teams spread across time zones plan their days.
What asynchronous communication means
GitLab’s public handbook defines it as the art of communicating and moving projects forward without the need for additional stakeholders to be available at the same time your communique is sent. Synchronous communication is the opposite: a live meeting, a phone call or a chat where both sides are expected to respond right away.
The distinction is about timing, not about the tool. A chat message sent with no expectation of an instant reply is asynchronous, while the same chat tool used for a rapid back-and-forth is effectively synchronous. What matters is the response expectation that the sender and receiver agree on.
Why teams adopt it
The main driver is distance between people. GitLab’s all-remote guide says that operating asynchronously is necessary even in colocated companies that have team members on various floors or offices, especially when multiple time zones are involved. When colleagues work at different hours, waiting for a shared meeting slot slows everything down.
A second reason is protecting concentration. A message that can wait removes the pressure to reply immediately, which leaves longer unbroken stretches for focused work. Pairing it with time blocking makes this explicit, because message checks then happen in set windows instead of all day.
A third reason is a written record. Decisions made in documents, issues or recorded updates can be found later by people who were not present, which cuts down on repeat explanations.
What research says about interruptions
A recent observational study in a hospital radiology department compared the interruptions radiologists received by method. In the study’s results, Microsoft Teams interruptions occurred 60.5% of the time during cases, in-person interruptions 82%, and phone interruptions 97.9%. The authors concluded that interruptions through predominantly asynchronous tools were shorter and less likely to occur during cases.
The setting matters. This was a clinical reading room, not an office, and the study observed interruption timing, not overall team output. It supports the narrow point that a message sent through an asynchronous channel is less likely to land in the middle of focused work than a call or a tap on the shoulder.
Choosing between async and a meeting
Asynchronous does not mean never meeting. The GitLab handbook’s meeting guidance says that a strategic balance between synchronous and asynchronous communication is required to achieve maximum efficiency. It also advises a simple test before scheduling anything: ask whether asynchronous methods could achieve the desired outcome.
In practice, a live conversation tends to suit a few situations:
- Sensitive feedback or conflict, where tone is easily misread in writing.
- Brainstorming that depends on rapid back-and-forth.
- Urgent problems that cannot wait for a written reply.
- Relationship building, especially early in a working relationship.
Status updates, routine decisions, document reviews and announcements usually work well in writing.
Habits that make it work
Asynchronous work fails when people treat written messages as if they were conversation. A few habits help:
- Write messages that stand on their own, with the context, the question and the deadline included.
- State when a reply is needed, so nobody has to guess whether something is urgent.
- Keep discussion in one shared place, so the thread is the record.
- Summarize the decision at the end, so readers who join late can skip the debate.
- Agree on a reasonable response window and respect it in both directions.
The GitLab handbook also states a preference order for where discussion should happen: use asynchronous communication when possible: merge requests (preferred) or issues. The lesson that carries over to any team is to pick a default home for each kind of discussion.
Making meetings more async-friendly
When a meeting is necessary, it can still include people who cannot attend live. The meeting guidance says that recorded presentations make content accessible, prevent confusion, and increase participation for team members who prefer consuming content asynchronously. Shared agendas that anyone can add to before the meeting, and written notes afterward, do the same job.
The reverse also works: a short weekly check-in, such as a weekly review, gives a team a regular moment to catch up on what moved in writing during the week without a standing call.
Common channels and what each is for
Most teams end up with a small set of channels, each with a different expected speed. Email suits messages to people outside the team and anything that needs a formal record. A chat tool suits short questions where a reply within a few hours is fine. Shared documents suit drafts, plans and decisions that several people need to edit or comment on. A task tracker or issue board suits work that has an owner and a status. Short recorded videos or voice notes suit walkthroughs that would take too long to type.
The common thread is that each channel has a stated purpose and a stated pace. A team that writes this down, even in a few lines, avoids the most common source of friction: one person expecting an instant answer in a place where the other person expects to check only at the end of the day.
Working across time zones
Time zones are where the approach pays off most. If a team spans several regions, a question asked at the end of one person’s day can be answered by the start of another’s, as long as the question was written completely. Incomplete questions are the main cause of lost days, because each missing detail costs a full round trip.
It helps to publish working hours somewhere visible, to rotate any unavoidable live meeting times so the same people do not always take the inconvenient slot, and to record those meetings so absent colleagues can catch up. The handbook’s meeting guidance adds that people can add agenda topics asynchronously before and during a meeting, which spreads participation beyond whoever happens to be in the room.
Limits and trade-offs
Asynchronous work has costs. Replies can take longer, ambiguity can sit unresolved for a day, and people who are new or uncertain may feel disconnected without live contact. Long threads can bury decisions, and written tone is easy to misjudge.
The fix is usually a clear escalation rule rather than abandoning the approach: if a thread goes back and forth more than a few times without progress, switch to a short call and then write down the outcome. Teams also need a way to flag genuinely urgent items so that a delayed reply never becomes a blocked project.
Frequently asked questions
Is email asynchronous communication?
Is email asynchronous communication?
Is email asynchronous communication?
Show answer
Yes, in the usual sense. Email does not require both people to be online at once, so it is a classic asynchronous channel, although it becomes synchronous if both sides treat it as an instant conversation.
Can chat apps be asynchronous?
Can chat apps be asynchronous?
Can chat apps be asynchronous?
Show answer
They can. A chat message is asynchronous when the sender does not expect an immediate reply and the receiver is free to answer at their own pace.
When is a meeting better than async?
When is a meeting better than async?
When is a meeting better than async?
Show answer
Live conversation fits sensitive feedback, fast brainstorming and urgent problems. The handbook’s test is to ask whether asynchronous methods could reach the same outcome before scheduling.
Does asynchronous work mean slower work?
Does asynchronous work mean slower work?
Does asynchronous work mean slower work?
Show answer
Individual replies can be slower, but projects may move faster overall because people are not waiting for shared meeting slots. A clear response window keeps the pace predictable.
