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Tier 2 CPaaS for 10DLC SMS, MMS, and group messaging
Signal House is a communications platform (CPaaS) that provides SMS, MMS, and group messaging through APIs and an in-platform gateway, positioned as a lower-cost alternative to Twilio and other aggregators. It operates as a Tier 2 aggregator, meaning traffic passes through at most one intermediary before reaching carriers, which the company credits for its delivery speed and support turnaround. Pricing is usage-based with published per-segment rates, volume discounts, and carrier fees passed through at cost.
Send and receive A2P SMS over 10-digit long codes, with toll-free and hosted SMS also supported and short code listed as coming soon.
Deliver images, video, GIFs and other multimedia as part of A2P campaigns, priced separately from SMS.
Group messaging threads so multiple participants stay in one real-time conversation rather than parallel one-to-one threads.
REST APIs and SDKs for embedding messaging into an existing application or stack, with documentation aimed at developers who want minimal abstraction.
Direct upstream connections mean at most one layer sits between the platform and the carriers, versus the three or four layers the company attributes to other CPaaS providers.
Handles A2P brand and campaign registration with published approval targets of 72 hours on pay-as-you-go and 48 hours above 500k segments per month.
Teams already sending 10DLC traffic port their numbers and campaigns to cut per-segment cost, which is the vendor's primary pitch.
Product teams integrate the messaging API so their own application handles conversation logic while Signal House handles carrier delivery.
Security-critical one-time passcodes and system notifications where delivery speed and reliability matter more than campaign features.
CRMs and vertical SaaS platforms use the aggregator underneath their own branded messaging feature, with 10DLC registration handled per end customer.
Local and toll-free numbers with volume-tiered monthly pricing, plus single and bulk porting of existing 10DLC and toll-free numbers.
Carrier and line-type lookup billed at $0.005 per query across all sender types.
Delivery and engagement analytics with real-time usage tracking intended to make spend visible before the invoice arrives.
Support is included at no cost on pay-as-you-go, with a dedicated Slack channel for accounts above 500k segments per month.
Sales and success teams run multi-party SMS threads so several people stay in one conversation with a customer in real time.
Authenticated CPaaS for verified SMS, email, and social messaging