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Signalmash

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2 reviews
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Average star rating
5.0
Serving customers since
2020

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Signalmash Reviews

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CD
Chaitanya D.
06/02/2026
Validated Reviewer
Review source: Organic

Clean APIs, real engineers on Slack, and no support black hole

As a backend engineer, I've worked with the majority of the major CPaaS vendors. The REST APIs offered by Signalmash are among the cleanest that I have encountered. Whatever stack you're on, you're covered thanks to OAuth 2.0, well-documented webhook signatures, and SDKs for Python, Node, Java, PHP, and.NET. It is indeed possible to use the sandbox environment for testing. The major differentiation, though, is the dedicated Slack channel. Instead of a tier-1 support representative reciting from a script when something doesn't function, I'm DMing an engineer who really wrote the code.
MW
Mukund W.
06/01/2026
Validated Reviewer
Verified Current User
Review source: Organic

RCS is a game-changer for our marketing campaigns

The RCS Multimedia tier is genuinely impressive. With the drag-and-drop campaign builder, our marketing team can now launch rich cards and interactive carousels without needing engineering support, which used to be a constant bottleneck. The 8000+ word limit, webview integration, and action buttons have also helped us revamp onboarding flows that previously required five separate SMS messages, consolidating them into a single rich card. Real-time analytics actually update in real time, and the built-in A/B testing is straightforward to set up and use.

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HQ Location:
Lake Oswego, US

Social

@signalmash

What is Signalmash?

Signalmash is a boutique CPaaS for SMS, Voice, RCS, and Identity, Tier-1 carrier connections (AT&T, Verizon, T-Mobile, Bandwidth) with white-glove support via a dedicated Slack channel for every customer. RCS Studio offers two tiers: RCS Rich for verified transactional messaging, and RCS Multimedia with a drag-and-drop builder, carousels, rich cards, and analytics, reaching 1.2B+ devices on Android and iOS 18+. Compliance (STIR/SHAKEN, 10DLC, TCPA) handled for you.

Details

Year Founded
2020
Website
signalmash.com