Communication · head to head
LINE WORKS vs Signal
LINE WORKS
Communication
Business chat built on the LINE interface, aimed at Japanese firms whose staff and customers already use LINE
- From
- Free
- Rated
- -
The short version
- Each has a real cost: LINE WORKS the external LINE bridge, which is the main reason to choose it, only matters where LINE has consumer penetration, so buyers outside Japan, Taiwan and Thailand are paying for a feature they cannot use.; Signal signal must be installed on a phone before the desktop app can be used, so there is no phone-free desktop-only account
- They diverge on capability: LINE WORKS covers External LINE messaging, Signal covers End-to-end encryption.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which LINE WORKS and Signal actually diverge.
| Attribute | LINE WORKS | Signal |
|---|---|---|
| Pricing model | Per user per month | free |
| Platforms | Web, iOS, Android, Windows, macOS | Windows, Macos, Linux, Ios, Android |
| Founded | Unknown | 2010 |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Communication).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in LINE WORKS
- External LINE messaging
- Chat and channels
- Voice and video calls
- Shared address book
- Calendar and bulletin board
- Drive
- Business email
- Admin controls
Only in Signal
- End-to-end encryption
- Disappearing messages
- Screen security
- Group chats
- Voice calls
- Video calls
- File sharing
- No data collection
What people use each for
The jobs each tool is most often brought in to do.
LINE WORKS
- A Japanese retail or service chain whose customers expect to book and enquire over LINE rather than emailnot Signal
- A clinic, dealership or estate agency that needs customer conversations on LINE but under corporate retention and auditnot Signal
- A Japanese SME under 30 staff that wants managed business chat at no licence cost on the free tiernot Signal
- The Japanese subsidiary of a foreign group that needs a local tool for front-line staff alongside the group standardnot Signal
Signal
- Private messagingnot LINE WORKS
- Secure group communicationnot LINE WORKS
- Confidential conversationsnot LINE WORKS
- Journalism communicationnot LINE WORKS
- Family messagingnot LINE WORKS
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
LINE WORKS
- The external LINE bridge, which is the main reason to choose it, only matters where LINE has consumer penetration, so buyers outside Japan, Taiwan and Thailand are paying for a feature they cannot use.
- The free tier caps total storage at 5GB across the whole organisation, not per user, so a team sharing photos or documents exhausts it within weeks and is pushed onto a paid plan.
- Business email is only on the Advanced plan at 800 yen per user, so an organisation wanting both chat and mail pays nearly double the Standard rate for every seat including staff who only chat.
- Developer documentation, support and the integration catalogue are strongest in Japanese, which makes it awkward to administer from a non-Japanese IT function.
- It has no serious developer or engineering workflow story, so organisations that also run Slack or Teams for technical teams end up maintaining two chat systems and two directories.
Signal
- Signal must be installed on a phone before the desktop app can be used, so there is no phone-free desktop-only account
Pricing, plan by plan
LINE WORKS
Free- FreeFree
- Up to 30 users
- 5GB total storage
- Chat, calls, calendar and address book
- Standard$450/month
- Unlimited users
- 1TB shared storage
- Annual contract price, 540 yen monthly
- Advanced$800/month
- Everything in Standard
- Business email
- 100TB shared storage
Signal
Free- FreeFree
- End-to-end encrypted messaging
- Voice and video calls
- Group chats
Which should you pick?
Choose LINE WORKS if
- You need external line messaging.
- You want to start without paying.
- You work on Web, iOS, Android, Windows, macOS.
- You also want chat and channels.
Choose Signal if
- You need end-to-end encryption.
- You want to start without paying.
- You work on Windows, Macos, Linux, Ios, Android.
- You also want disappearing messages.
Questions people ask
- Is LINE WORKS or Signal better?
- Neither clearly leads. LINE WORKS starts at Free and Signal at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, LINE WORKS or Signal?
- LINE WORKS starts at Free and Signal at Free.
- Does LINE WORKS or Signal run on more platforms?
- LINE WORKS runs on Web, iOS, Android, Windows, macOS. Signal runs on Windows, Macos, Linux, Ios, Android.
- Can I use LINE WORKS for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is LINE WORKS best used for?
- LINE WORKS is most often used for a japanese retail or service chain whose customers expect to book and enquire over line rather than email, a clinic, dealership or estate agency that needs customer conversations on line but under corporate retention and audit, a japanese sme under 30 staff that wants managed business chat at no licence cost on the free tier, the japanese subsidiary of a foreign group that needs a local tool for front-line staff alongside the group standard. Of those, a japanese retail or service chain whose customers expect to book and enquire over line rather than email and a clinic, dealership or estate agency that needs customer conversations on line but under corporate retention and audit are not what Signal is typically brought in for.
- What can LINE WORKS do that Signal cannot?
- LINE WORKS covers External LINE messaging, Chat and channels, Voice and video calls, Shared address book. Signal covers End-to-end encryption, Disappearing messages, Screen security, Group chats.
Answered from the vendors’ own pages
LINE WORKS: Can LINE WORKS really message ordinary LINE users?
Yes. That is its core differentiator and the reason Japanese customer-facing businesses buy it.
Signal: How much does Signal cost?
Signal is free for everyone. The messaging app is supported by grants and donations, not user fees, and is maintained by an independent nonprofit that is not tied to any major tech companies.
SourceLINE WORKS: Is there a free plan?
Yes, up to 30 users with 5GB of total organisation storage.
Signal: Does Signal have ads?
No. Signal is ad-free and does not collect advertising revenue.
SourceLINE WORKS: Does the Standard plan include email?
No. Business email is Advanced only, at 800 yen per user per month on an annual contract.
LINE WORKS: Is it worth buying outside Japan?
Generally no. Without the consumer LINE bridge it competes poorly against Slack, Teams or Lark on features and ecosystem.
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