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SPECIFICTION
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Quo vs Signal

Quo

quo.com

Signal

signal.org

Side by side

FigureQuoSignal
Price from$15/moFree
Free plan—Yes
Free trialYes—
Open source——
WebYes—
WindowsYesYes
macOSYesYes
Linux—Yes
iOSYesYes
AndroidYesYes
APIYes—
Plans published31
Spec score · VoIP calling apps8.9 (#2)7.9 (#10)
FundingQuo announced $105 million in growth funding when it rebranded from OpenPhone on September 23, 2025.Signal says it is an independent 501(c)(3) nonprofit supported by grants and donations.
HeadquartersLinkedIn lists Quo headquarters in San Francisco, California.Mountain View, California, United States
IntegrationsThe integration directory lists HubSpot, Salesforce, Jobber, Pipedrive, Zoho CRM, Attio, Clio, Slack, Zapier, Make, Gong, ChatGPT, Claude and others.Signal's privacy policy names YouTube, Spotify, and Giphy as third-party services users may interact with in connection with Signal.
MessagingQuo supports SMS and MMS, scheduled messages, auto-replies, snippets and AI-generated replies.Users can share text, voice messages, photos, videos, GIFs, and files for free.

Plans

Quo

  • Starter$15 a month
  • Business$23 a month
  • Scale$35 a month

Quo pricing →

Signal

  • SignalFree

Signal pricing →

In their own words

Quo

Quo is a paid business phone service with web, Windows, macOS, iOS and Android support. It offers desktop and mobile apps, multiple business numbers, an auto attendant, custom call routing and voicemail transcription. Quo has no free plan, but a seven-day trial is listed. Its pricing note gives a starting rate of $15/user/mo on an annual term. Separately, monthly plan listings show Starter at $19 a month, Business at $33 a month and Scale at $47 a month. Each of those monthly listings includes one phone number per user and 1,000 free automation credits. The annual starting-price note and monthly plan figures are distinct details, so readers should check which billing term applies to their choice. With support for five listed platforms and both mobile and desktop apps, Quo provides business calling across a range of devices. Its call-handling options include routing calls and directing callers through an auto attendant.

Visit quo.com

Signal

Signal is a private messaging app for Android, iOS, Linux, macOS and Windows. Users can send text, voice messages, photos, videos, GIFs and files, and make voice or video calls, including group calls. Group chats provide administrators, permissions and @mentions. Signal says messages and calls are always end-to-end encrypted and inaccessible to Signal, and that it does not sell, rent or monetize personal data or content. Users may connect through a unique username without sharing their phone number with contacts, although registration still requires a phone number. Desktop use requires Signal to be installed on a phone first, and an account can have up to five linked devices. The free plan includes messaging and calling. Signal identifies itself as an independent 501(c)(3) nonprofit supported by grants and donations. Its terms require users to be at least 13, with potentially higher local minimums. The Support Center covers getting started, features, security, troubleshooting and general topics. Signal also supports disappearing messages and encrypted backups.

Visit signal.org