Signalmash vs SignalWire: SMS, Voice and SIP Pricing Compared (2026)

Quick answer: Signalmash vs SignalWire

On published US list rates in September 2026 the two are close on SMS (Signalmash $0.0039 per segment on its no-minimum plan, SignalWire $0.00415 on 10DLC), Signalmash is cheaper on MMS ($0.0159 vs $0.020 outbound) and on US outbound voice ($0.0068 vs $0.0080 per minute), and SignalWire is cheaper on number rental at entry level ($0.50 vs $0.95 a month for a local number), on toll-free inbound minutes and on short-code leasing. The bigger differences are structural: Signalmash includes 10 calls per second of capacity and does your 10DLC, toll-free and RCS registration for you with people on a Slack channel; SignalWire charges per call-per-second above one, leaves registration to you, and in exchange gives developers a much wider programmable surface, including AI voice agents at $0.16 a minute, video, fax and an MFA API. Pick Signalmash if you want messaging and voice that works with someone accountable for it; pick SignalWire if you are building a voice application and want the FreeSWITCH team's platform underneath it.

Every figure below is the provider's own published US list price, read from signalmash.com/pricing and signalwire.com/pricing on 4 September 2026. Both change prices and both offer committed-use discounts; check the live pages before deciding. Carrier pass-through fees (AT&T $0.0035, T-Mobile $0.0045, Verizon $0.0045 per outbound segment and so on) are set by the carriers and are the same whichever provider you use.

Messaging rates

Read across a row and the picture is mixed rather than one-sided. On a programme sending 100,000 local-number segments a month, the SMS base cost is about $390 on Signalmash Launch against $415 on SignalWire, and the $19 platform fee roughly cancels the difference; the carrier fees on top (around $350 to $450 for that volume) are identical. At MMS-heavy or toll-free-heavy mixes Signalmash pulls ahead; for a business that mostly needs many cheap numbers and sends little, SignalWire's $0.50 local numbers win.

10DLC registration: who does the work, and what it costs

SignalWire publishes the registry fees it passes through, which is useful for everyone: brand registration $4.50 one-time, $10 a month per standard campaign ($1.50 for low-volume mixed, $3 charity, $5 emergency, $30 agents and franchises), a $7.50 DCA vetting fee per campaign and per resubmission, and T-Mobile's $250 inactivity fee for any campaign left idle for 60 days. Number pooling for 50-plus numbers carries a $100 processing fee plus a $2,000 configuration fee, and brands sending more than 200,000 segments a day pay a $500 DCA fee plus a special business review.

The registration itself is self-service on SignalWire: you fill in the brand and campaign forms in the dashboard, and a rejection costs you the resubmission fee and a review cycle. Signalmash passes the same registry fees through but completes the brand and campaign registration for you as part of onboarding, orders the right vetting tier and handles any resubmission. If you have never registered a campaign, our 10DLC readiness checker shows what a reviewer will ask for on either platform.

Voice and SIP rates

For a PBX or contact centre the two numbers that matter are outbound local and capacity. Signalmash is about 15 percent cheaper per outbound minute and includes ten calls per second, which covers a 100-agent dialer's set-up bursts; on SignalWire the same ten CPS costs $135 a month on a three-month commitment. SignalWire wins on toll-free inbound minutes, so a business that runs a large inbound 800-number and little else should price that specifically. See the SIP trunking providers comparison for how both sit against Telnyx, Bandwidth and Twilio.

What each platform is actually for

SignalWire

SignalWire was built by the team behind FreeSWITCH, and it shows: programmable voice with real-time media control, SWML call scripting, WebRTC, video rooms, fax, an MFA API, and an AI Agent runtime at $0.16 a minute that bundles speech-to-text, an LLM and text-to-speech, with premium voices and live translation billed per character or per minute. If you are building a voice application, an AI receptionist or a contact-centre product from primitives, SignalWire gives you more to build with than almost anyone. The trade-offs are that messaging compliance is your job, capacity is metered, and support beyond community and tickets is a commercial conversation.

Signalmash

Signalmash is a US carrier-grade CPaaS aimed at businesses that need messaging and voice to work rather than a platform to program: SMS, MMS and RCS (through SimplyRCS) on the same numbers, elastic SIP trunking with direct Tier-1 routes, branded caller ID and CNAM, number intelligence, and managed compliance for 10DLC, toll-free and RCS. Support is a shared Slack channel with a voice or messaging engineer in it. The trade-offs are the $19 platform fee, a US-and-Canada focus rather than 60 countries, and no AI-agent runtime or video product; developers get a plain HTTPS API (see the SMS API and OTP SMS API) rather than a media-scripting language.

Which should you choose?

• You are building an AI voice agent, an IVR from scratch or a video product: SignalWire. Nothing on the Signalmash side competes with the AI runtime or the media control.
• You run a PBX, a contact centre or a dialer and buy minutes: Signalmash, on outbound rate, included capacity and support model. Price toll-free inbound separately if it dominates your traffic.
• You send appointment reminders, alerts, OTPs or marketing texts and do not have a compliance person: Signalmash, because the registration is done for you and a rejection does not become your problem.
• You are a developer who wants the lowest entry cost with many numbers and light traffic: SignalWire's $0.50 numbers and no platform fee are hard to beat at that scale.
• You need RCS with verified sender branding on the same account as SMS: Signalmash, via SimplyRCS. SignalWire's messaging page covers SMS and MMS.

Send us your monthly segment and minute volumes and we will price them all-in against SignalWire's published rates, carrier fees and capacity charges included, and tell you honestly if SignalWire is the better fit.

People also ask

Is SignalWire cheaper than Signalmash for SMS?

Not on the base rate: SignalWire lists $0.00415 per segment on 10DLC numbers against Signalmash's $0.0039 on its no-minimum plan, falling to $0.0031 at scale. Signalmash adds a $19 monthly platform fee, so at very low volumes SignalWire can still cost less overall, and SignalWire's $0.50 local numbers are cheaper than Signalmash's $0.95 entry-level rental. Carrier pass-through fees are identical on both.

How much does SignalWire charge per minute for calls?

SignalWire's published US rates are $0.0080 per minute outbound and $0.0066 inbound on local numbers, $0.0069 outbound and $0.0147 inbound on toll-free numbers, and $0.0030 per SIP or WebRTC leg. Capacity above one call per second costs $15 to $40 per CPS per month on a three-month commitment, and E911 is $0.75 per number per month.

Does SignalWire handle 10DLC registration?

SignalWire provides the forms and passes through the registry fees (brand $4.50, campaign $10 a month for standard use cases, $7.50 DCA vetting per submission), but the registration is self-service and resubmissions after a rejection are charged again. Signalmash completes the brand and campaign registration on the customer's behalf as part of onboarding and manages any resubmission.

What does SignalWire offer that Signalmash does not?

An AI Agent runtime at $0.16 a minute, programmable media control and SWML scripting from the FreeSWITCH team, WebRTC and video rooms, fax, an MFA API and a global footprint. Signalmash offers RCS business messaging, branded caller ID and CNAM, number intelligence, managed 10DLC and toll-free registration, ten calls per second of included capacity and engineer-staffed Slack support instead.

Can I move from SignalWire to Signalmash without losing my numbers?

Yes. US local and toll-free numbers port between providers with a letter of authorisation and a recent invoice; SignalWire charges $5 per number to port out, and Signalmash handles the port and re-provisions E911 and CNAM during onboarding. Local numbers typically move in one to two weeks and toll-free in two to four.