Comparison
Overview
Company snapshot and where each provider is based.
| Field | SlickText | SMSAPI |
|---|---|---|
| What it is | SlickText is a US and Canada SMS, MMS, and RCS marketing platform for mass texting campaigns, automation, and two-way conversations, offering a REST API and webhooks. | A Polish business-messaging platform (a brand of LINK Mobility Poland, part of LINK Mobility Group) offering bulk SMS, MMS, VMS voice, RCS and WhatsApp Business messaging via REST API and a web interface. |
| Founded | 2012 | 2007 |
| Ownership | private | public |
| Employees | 11-50 | 51-200 |
| HQ city | Jamestown | Gliwice |
| HQ country | USA | Poland (EU) |
What's the differenceSMSAPI edges ahead on the overall messaging.dev Score (44 vs 38). SlickText is private and headquartered in Jamestown, USA; SMSAPI is public and based in Gliwice, Poland (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | SlickText | SMSAPI |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | Yes |
| RCS | Yes | Yes |
| No | Yes | |
| Viber | No | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | No | Yes |
| No | No |
What's the differenceThey share 3 channels. SMSAPI additionally offers WhatsApp, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | SlickText | SMSAPI |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | No | Free test SMS on signup |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | — | PHP, Python, JavaScript, Java, C#, Go, Bash |
| Sandbox / test env | No | Yes |
| API types | REST | REST, SMTP |
What's the differenceOn SDKs, SMSAPI adds PHP, Python, JavaScript, Java, C#, Go, Bash; SMSAPI offers Sandbox / test env, while SlickText does not; on API types, SMSAPI adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | SlickText | SMSAPI |
|---|---|---|
| EU data residency | No | Yes |
| US data residency | Yes | No |
| Choose region | No | No |
| GDPR | No | Yes |
| ISO 27001 | No | Yes |
| SOC 2 | Yes | No |
| HIPAA | Yes | No |
What's the differenceSMSAPI offers EU data residency, while SlickText does not; SlickText offers US data residency, while SMSAPI does not; SMSAPI offers GDPR, while SlickText does not; SMSAPI offers ISO 27001, while SlickText does not; SlickText offers SOC 2, while SMSAPI does not; SlickText offers HIPAA, while SMSAPI does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | SlickText | SMSAPI |
|---|---|---|
| Retention policy | Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored. | Messages are stored in accordance with applicable law and disclosed only when required by a lawful request; phone numbers are used solely for SMS campaign purposes. No specific retention period is publicly documented. All data is held within the EEA on two redundant data centers in Poland (ATMAN and T-Mobile, over 150 km apart). |
What's the differenceSlickText: Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored. SMSAPI: Messages are stored in accordance with applicable law and disclosed only when required by a lawful request; phone numbers are used solely for SMS campaign purposes. No specific retention period is publicly documented. All data is held within the EEA on two redundant data centers in Poland (ATMAN and T-Mobile, over 150 km apart).
Pricing & Credits
Pricing model and the cost of a first message.
| Field | SlickText | SMSAPI |
|---|---|---|
| Pricing model | Monthly subscription plans that each include a fixed pool of message credits (one credit equals one standard SMS segment), with rollover credits and custom enterprise pricing. | Pay-as-you-go prepaid credit — pay only for sent messages with no setup fee or contract; minimum top-up around €30. |
| SMS starting price | From $29/month for 500 credits (~$0.058 per SMS credit), US/Canada | From ~€0.04 per SMS (international, varies by destination country) |
| Free developer credit | No | Free test SMS on signup |
What's the differenceSlickText and SMSAPI are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | SlickText | SMSAPI |
|---|---|---|
| Countries covered | 2 | 0 |
| Direct operator connections | No | No |
| Published uptime SLA | No published SLA | No published SLA |
What's the differenceSlickText leads on Countries covered (2 vs 0 for SMSAPI).
Company & Trust
Independent reviews and company profile.
| Field | SlickText | SMSAPI |
|---|---|---|
| G2 rating | 4.8 | 0.0 |
| G2 reviews | 1,814 | 0 |
| Ownership | private | public |
| Employees | 11-50 | 51-200 |
What's the differenceSlickText leads on G2 rating (4.8 vs 0 for SMSAPI); SlickText leads on G2 reviews (1,814 vs 0 for SMSAPI).
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