Comparison
Overview
Company snapshot and where each provider is based.
| Field | Prelude | SendPulse |
|---|---|---|
| What it is | Developer platform for phone and email verification (OTP), authentication, number intelligence, and anti-fraud onboarding delivered across SMS, RCS, WhatsApp, voice and other channels. | Multi-channel marketing and messaging platform offering email, SMS, web push, and chatbots (WhatsApp, Telegram, Viber, Facebook Messenger, Instagram) through a unified interface and REST API. |
| Founded | 2022 | 2015 |
| Ownership | private | private |
| Employees | 51-200 | 51-200 |
| HQ city | Paris | New York |
| HQ country | France (EU) | USA |
What's the differenceSendPulse edges ahead on the overall messaging.dev Score (63 vs 62). Prelude is private and headquartered in Paris, France (EU); SendPulse is private and based in New York, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | Prelude | SendPulse |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | No |
| Yes | Yes | |
| Viber | Yes | Yes |
| Facebook Messenger | No | Yes |
| Telegram | Yes | Yes |
| Apple Messages for Business | No | No |
| Voice | Yes | No |
| Yes | Yes |
What's the differenceThey share 5 channels. Prelude additionally offers RCS, Voice, while SendPulse additionally offers Facebook Messenger.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Prelude | SendPulse |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | No | Free plan (15,000 emails/mo) + 10 test SMS |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | Node.js, Python, Go, Java, Ruby, PHP, C# | PHP, Python, Ruby, Java, Node.js, C# |
| Sandbox / test env | No | No |
| API types | REST | REST, SMTP |
What's the differenceOn SDKs, Prelude adds Go; on API types, SendPulse adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Prelude | SendPulse |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | Yes |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | No |
| SOC 2 | Yes | No |
| HIPAA | No | No |
What's the differenceSendPulse offers US data residency, while Prelude does not; Prelude offers ISO 27001, while SendPulse does not; Prelude offers SOC 2, while SendPulse does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Prelude | SendPulse |
|---|---|---|
| Retention policy | Not publicly documented in detail. Prelude is a European (Paris-based) company that hosts and processes data in EU data centers under GDPR, with SOC 2 Type 2 and ISO 27001:2022 controls including encryption of data in transit and at rest. It states that only essential data is stored for delivery tracking, but specific message-content and metadata retention periods are not published on the site or trust center. | Personal data is retained for as long as needed to provide the services or to comply with legal obligations, resolve disputes, and enforce agreements. Servers are located in the United States and Germany with redundant, backed-up storage; under GDPR users can access, export, or request deletion of their data, and all account data is permanently deleted when an account is terminated. |
What's the differencePrelude: Not publicly documented in detail. Prelude is a European (Paris-based) company that hosts and processes data in EU data centers under GDPR, with SOC 2 Type 2 and ISO 27001:2022 controls including encryption of data in transit and at rest. It states that only essential data is stored for delivery tracking, but specific message-content and metadata retention periods are not published on the site or trust center. SendPulse: Personal data is retained for as long as needed to provide the services or to comply with legal obligations, resolve disputes, and enforce agreements. Servers are located in the United States and Germany with redundant, backed-up storage; under GDPR users can access, export, or request deletion of their data, and all account data is permanently deleted when an account is terminated.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | Prelude | SendPulse |
|---|---|---|
| Pricing model | Pay-as-you-go per-verification pricing plus at-cost (zero-markup) per-message charges, with optional Startup subscription and custom Enterprise tiers. | Pay-as-you-go for SMS (priced per message by destination country); free-forever plan plus paid monthly subscription tiers for email and other channels. |
| SMS starting price | €0.0043 per SMS (US, at-cost); verification fee from €0.032 | €0.01 per SMS (e.g. Colombia, Turkey) |
| Free developer credit | No | Free plan (15,000 emails/mo) + 10 test SMS |
What's the differencePrelude and SendPulse are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Prelude | SendPulse |
|---|---|---|
| Countries covered | 230 | 200 |
| Direct operator connections | Yes | No |
| Published uptime SLA | No published SLA | No published SLA |
What's the differencePrelude leads on Countries covered (230 vs 200 for SendPulse); Prelude offers Direct operator connections, while SendPulse does not.
Company & Trust
Independent reviews and company profile.
| Field | Prelude | SendPulse |
|---|---|---|
| G2 rating | 4.9 | 4.6 |
| G2 reviews | 13 | 714 |
| Ownership | private | private |
| Employees | 51-200 | 51-200 |
What's the differencePrelude leads on G2 rating (4.9 vs 4.6 for SendPulse); SendPulse leads on G2 reviews (714 vs 13 for Prelude).
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