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Utilities · head to head

Transmission vs Truecaller

Transmission logo

Transmission

Utilities

Free open source BitTorrent client known for a minimal interface and low resource use

From
Free
Rated
-
Full reviewWebsite
Truecaller logo

Truecaller

Utilities

Caller ID and spam blocking app that identifies unknown numbers by crowdsourcing users' contact books

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Transmission it has no built in search tab, so finding torrents means using a separate browser tab or search engine, unlike qBittorrent.; Truecaller its caller ID database is built from other users uploading their contact books, which means a person's name and number can be listed without them ever installing or consenting to Truecaller directly.
  • They diverge on capability: Transmission covers Minimal interface, Truecaller covers Caller ID.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Transmission and Truecaller actually diverge.

Attributes where Transmission and Truecaller differ
AttributeTransmissionTruecaller
Pricing modelOpen source, no licence feeFree tier plus subscription
PlatformsMac, Windows, LinuxiOS, Android

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Utilities).

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 Transmission

  • Minimal interface
  • transmission-daemon
  • Built in web UI
  • Low resource use
  • Bandwidth limits and scheduling
  • Wide platform and firmware support

Only in Truecaller

  • Caller ID
  • Spam blocking
  • Call recording
  • SMS spam filtering
  • Truecaller for Business
  • Premium profile controls

What people use each for

The jobs each tool is most often brought in to do.

Transmission

  • A user running torrents on a NAS, Raspberry Pi or router firmware where every bit of CPU and memory mattersnot Truecaller
  • Someone who wants the simplest possible torrent interface with no extra tabs or configuration to learnnot Truecaller
  • A user who wants headless remote operation without installing a separate web UI packagenot Truecaller
  • Anyone replacing a heavier client because Transmission uses noticeably less resource for the same workloadnot Truecaller

Truecaller

  • Someone wanting to identify unknown numbers calling from delivery services, banks or scam operationsnot Transmission
  • A user who wants unknown-sender SMS automatically filtered out of the main inboxnot Transmission
  • A small business wanting its verified name and logo to show when it calls customersnot Transmission
  • A person who wants to check whether their own number is unexpectedly listed and request removalnot Transmission

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Transmission

  • It has no built in search tab, so finding torrents means using a separate browser tab or search engine, unlike qBittorrent.
  • Its remote and thin-client capabilities, while functional through the web UI, are less complete than Deluge purpose-built daemon and thin-client separation.
  • The interface deliberately omits advanced features such as RSS automation that qBittorrent includes, so power users may find it too basic.
  • As with any torrent client, legal use depends entirely on the content being downloaded, which the app does not moderate.
  • Development pace has historically been slower than qBittorrent, with fewer new features added per year.

Truecaller

  • Its caller ID database is built from other users uploading their contact books, which means a person's name and number can be listed without them ever installing or consenting to Truecaller directly.
  • Removing a number requires actively finding and using the unlisting tool; it is opt-out, not opt-in, so most people never realise they need to do this.
  • The free tier is ad-supported, and ads appear on the call screen itself, which some users find intrusive during otherwise mundane phone use.
  • Call recording availability depends on local law and has been restricted or removed in some regions and OS versions, so it cannot be relied on everywhere.
  • Regulatory and app-store scrutiny of the contact-upload model has led to restrictions or bans in some countries, so availability and feature set are not consistent globally.

Pricing, plan by plan

Transmission

Free
  • TransmissionFree
    • Free and open source, no account needed
    • transmission-daemon with built in web UI
    • Low resource use on modest hardware

Truecaller

Free
  • FreeFree
    • Caller ID and spam blocking
    • Ad-supported
    • Limited profile privacy controls
  • Premium$2.99/month
    • Ad-free
    • See who viewed your profile
    • Priority spam list updates

Which should you pick?

Choose Transmission if

  • You need minimal interface.
  • You want to start without paying.
  • You work on Mac, Windows, Linux.
  • You also want transmission-daemon.
Transmission review

Choose Truecaller if

  • You need caller id.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want spam blocking.
Truecaller review

Questions people ask

Is Transmission or Truecaller better?
Neither clearly leads. Transmission starts at Free and Truecaller at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Transmission or Truecaller?
Transmission starts at Free and Truecaller at Free.
Does Transmission or Truecaller run on more platforms?
Transmission runs on Mac, Windows, Linux. Truecaller runs on iOS, Android.
Can I use Transmission for free?
Both have a free tier, so you can try either at no cost before committing.
What is Transmission best used for?
Transmission is most often used for a user running torrents on a nas, raspberry pi or router firmware where every bit of cpu and memory matters, someone who wants the simplest possible torrent interface with no extra tabs or configuration to learn, a user who wants headless remote operation without installing a separate web ui package, anyone replacing a heavier client because transmission uses noticeably less resource for the same workload. Of those, a user running torrents on a nas, raspberry pi or router firmware where every bit of cpu and memory matters and someone who wants the simplest possible torrent interface with no extra tabs or configuration to learn are not what Truecaller is typically brought in for.
What can Transmission do that Truecaller cannot?
Transmission covers Minimal interface, transmission-daemon, Built in web UI, Low resource use. Truecaller covers Caller ID, Spam blocking, Call recording, SMS spam filtering.

Answered from the vendors’ own pages

Transmission: Is Transmission free?

Yes, entirely, and it is open source with no paid tier or ads.

Truecaller: How does Truecaller know who is calling me from an unsaved number?

It matches the number against a database built largely from other users' uploaded contact lists, plus spam reports from its user base.

Transmission: Why is Transmission popular on NAS devices?

Because it runs as a lightweight daemon with low CPU and memory use and a built in web UI, which suits always-on, low powered hardware.

Truecaller: Can I remove my number from Truecaller if I never installed it?

Yes, Truecaller provides an unlisting search and removal tool at truecaller.com/unlisting, though you must find and use it yourself.

Transmission: Does Transmission have search built in?

No. Unlike qBittorrent, finding torrents requires a separate search tool outside the app.

Truecaller: Does Truecaller read my messages or call content?

Truecaller states it does not access call or message content, only caller ID and spam-reporting metadata.

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