Signal House is a communications platform, or CPaaS, for sending SMS and MMS messages through an API, positioned as a Tier 2 aggregator with fewer intermediary hops to carriers. For organizations reaching beneficiaries in areas with low smartphone or internet penetration, it delivers program reminders and alerts by plain text message at scale.
Key features
- 10DLC (10-digit long code) and toll-free SMS/MMS messaging
- Group messaging
- Messaging APIs built for CRM integration
- Fast A2P number approval, within 72 hours for local numbers
- Live support included on every plan
- Voice, RCS, short codes, and alphanumeric sender IDs listed as coming soon
Pricing
Per signalhouse.io/pricing: 10DLC local numbers run from $1.00/month for a single number down to $0.25/month at 1,000-plus numbers. SMS runs from $0.0065 per segment down to $0.0030 at 10 million-plus monthly volume; MMS from $0.0200 down to $0.0170 at high volume. Toll-free numbers are a flat $1.00/month, with SMS from $0.0079 to $0.0050 per segment depending on volume, and MMS rates matching 10DLC. Carrier pass-through fees are included, and high-volume senders can negotiate rates.
Last verified: September 2026, against Signal House’s own pricing page.
Pros and cons
| Pros | Cons |
|---|---|
| Per-message pricing this granular makes SMS affordable even for a mid-size beneficiary list, and rates drop further at scale | This is an API-first, developer-facing product, not a point-and-click messaging tool |
| The Tier 2 aggregator model is built for integration into an existing CRM or case management system | Several features, including voice, RCS, and short codes, are still coming soon |
| Live support on every plan matters when a delivery issue needs a fast answer | Per-segment SMS pricing means a long message that splits into multiple segments costs more than it first appears |
Who it’s best for
An organization with in-house technical capacity, or a developer partner, that wants to build SMS alerts, appointment reminders, or emergency notifications directly into its own CRM or beneficiary database.
Skip it if your team has no developer resources to integrate an API and you need an out-of-the-box, non-technical bulk SMS sending interface instead.
How to get started
Provision a single local number, confirm A2P approval, and send a small test batch of messages through the API before wiring it into your full beneficiary database.
FAQ
Does Signal House require a developer to set up? Yes. It is built around messaging APIs for integration into existing systems, so technical setup is expected.
How fast can we get a number approved for sending? Local 10DLC numbers are typically approved within 72 hours.
Can Signal House send to beneficiaries without smartphones? Yes. SMS and MMS work on any mobile phone capable of receiving text messages, not just smartphones.
Disclosure: Impact DOTS may earn a commission if you sign up for Signal House through the links in this article. This does not change what you pay, and it does not influence which tools we choose to cover.
