ASPSMS vs simhook
ASPSMS
aspsms.comsimhook
simhook.devSide by side
| Figure | ASPSMS | simhook |
|---|---|---|
| Price from | — | $10/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| iOS | Yes | — |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 19 | 6 |
| Spec score · SMS Gateway Software | 9.3 (#2) | 8.1 (#20) |
| Founded | VADIAN.NET AG is listed as founded in 1995. | 2026 |
| Integrations | ASPSMS lists workflow integrations with Zapier, Microsoft Power Automate and Make, and names Google apps, Slack, ChatGPT and PayPal among Zapier-connected services. | The TypeScript SDK supports Node and edge runtimes, and the MCP server provides eight tools for AI agents; the maker documents setup for Claude Desktop, Cursor, and Claude Code. |
| Product | ASPSMS adds SMS functionality to business software and web applications and supports sending messages to more than 200 countries and 900 mobile networks. | SimHook turns an Android phone with a SIM into an SMS gateway and API for sending and receiving texts. |
| Self-hosting | The documentation describes hosted gateway APIs and downloadable client components, but does not state that the ASPSMS gateway can be self-hosted. | The full stack can be self-hosted from one Compose file under AGPL-3.0, and the maker says self-hosting is free with no limits. |
Plans
ASPSMS
- 500 Credits€30, paid once
- 500 Credits45 CHF, paid once
- 1’000 Credits€60, paid once
- 1,000 Credits90 CHF, paid once
- 2’500 Credits€150, paid once
- 2,500 Credits225 CHF, paid once
- 5’000 Credits€300, paid once
- 5,000 Credits450 CHF, paid once
- 10’000 Credits€550, paid once
- 10,000 Credits800 CHF, paid once
simhook
- FreeFree
- Self-hostedFree
- Pro$12 a month
- Scale$39 a month
- Pro (annual)$120 a year
- Scale (annual)$390 a year
In their own words
ASPSMS
ASPSMS adds SMS messaging to business software and web applications, with delivery to more than 200 countries and 900 mobile networks. It supports text, binary, Unicode, and concatenated messages, as well as bulk and personalized bulk delivery, sender originators, and real-time delivery notifications. The service includes two-way messaging, inbound SMS, delivery reports, and API access. Connection options include REST/JSON, SOAP, HTTP, SMTP/email-to-SMS, ActiveX, and XML. ASPSMS also lists workflow integrations with Zapier, Microsoft Power Automate, and Make. The JSON API includes ASPTOKEN, which the company describes as a two-factor authentication method. Listed use cases include CRM and ERP integration, SMS marketing, alerts, and two-factor authentication. The service has a free trial but no free plan. Credits are sold as one-time purchases and do not expire: 500 Credits costs 30.00 EUR upfront, while 100’000 Credits costs 4’000.00 EUR upfront. Larger quantities are available at a price on request. Downloads include SMS Blaster WinLog for Windows, an ASPSMS Widget for Mac, and an SMS app for iPhone and iPod touch. ASPSMS is headquartered in St. Gallen, Switzerland, and was founded in 1995.
simhook
SimHook turns an Android phone with a SIM into an SMS gateway and API for sending and receiving texts. API messages travel through the paired phone, while incoming texts can be forwarded as webhooks. Signed webhooks report sent, delivered, and failed status changes; they are retried for two days and paused if an endpoint keeps failing. The service also supports scheduled sends, multiple recipients, and dual-SIM phones, with a SIM selectable for each message. Its TypeScript SDK supports Node and edge runtimes, and an MCP server provides eight tools for AI agents. API keys can be limited by scope, including a send-only option. The Android app requires Android 8.0 or newer and is distributed as a signed APK. The full stack can be self-hosted from one Compose file under AGPL-3.0, which the maker says is free without limits. Hosted accounts are currently on Free; listed paid plans open soon. The maker says the service is not for bulk marketing or unsolicited texts.