Managed SMTP relay or AWS-native sending
SMTP2GO and Amazon SES are both infrastructure-oriented, but they differ in how much product experience sits around sending. SMTP2GO is a managed SMTP relay with dashboards, monitoring, support, and a simpler setup path for mixed systems. Amazon SES is AWS-native sending infrastructure that gives engineering more control but expects more setup and surrounding workflow.
Choose SMTP2GO when the team wants a practical relay. Choose SES when the team wants to build on AWS primitives.
Use-case fit
| Need | Better fit | Why |
|---|---|---|
| Simple managed SMTP relay | SMTP2GO | SMTP2GO is easier for teams connecting many existing apps. |
| AWS-native low-level email sending | Amazon SES | SES fits teams that want direct infrastructure control. |
| Monitoring and support around relay usage | SMTP2GO | SMTP2GO gives more product surface around sending. |
| Custom engineering-owned email system | Amazon SES | SES works when engineering will build the missing workflow. |
| SaaS transactional plus lifecycle email | Sequenzy | Sequenzy is for product and billing lifecycle messages, not relay infrastructure. |
What to verify
For SMTP2GO, verify dashboard needs, alerting, SMTP compatibility, and reporting. For SES, verify bounce handling, suppression management, identity setup, logs, and admin tooling. SES may look simpler until the team lists everything it needs to build around it.
Where Sequenzy fits
Sequenzy fits SaaS teams that need transactional email, lifecycle sequences, newsletters, and Stripe-triggered automation. It is not a generic SMTP relay or an AWS infrastructure component.
Pricing reality
At the cited 100,000 emails/month context, SMTP2GO is listed at $10/month for 10,000 emails/month. Amazon SES is listed at $0.10 per 1,000 emails with no monthly fee. Sequenzy is listed at $49/month.
SES is cheaper on raw send cost, but the operational comparison should include bounce handling, suppression management, logs, dashboards, alerting, and who maintains the surrounding infrastructure.
Review signals
The cited SMTP2GO review highlights simple SMTP relay and delivery analytics. The cited Amazon SES review highlights low cost at scale and AWS integration. Those signals reinforce the tradeoff: SMTP2GO for managed operational visibility, SES for teams comfortable owning AWS email plumbing.
Use-case matchups
| Situation | Best first look | Why |
|---|---|---|
| Team wants managed SMTP/API relay with support, testing, and straightforward deliverability operations | SMTP2GO | SMTP2GO is the better first demo when that is the main buying job. |
| Team wants raw AWS email infrastructure and lowest invoice cost | Amazon SES | Amazon SES is the better first demo when that is the main buying job. |
| SaaS team wants infrastructure plus lifecycle email | Sequenzy | Sequenzy is relevant when transactional email, campaigns, and Stripe or product lifecycle events need one workflow. |
| Engineering team only needs delivery infrastructure | SMTP2GO or Amazon SES | Keep the comparison between infrastructure tools if marketing automation is out of scope. |
| Growth team needs journeys, not only delivery | Sequenzy | Sequenzy is a better fit when the operational question is lifecycle messaging rather than SMTP/API delivery alone. |
Best Fit by Relay Operations and AWS Control
Best managed SMTP relay for existing systems
SMTP2GO is the better fit when the team needs a practical relay for existing apps, servers, CRMs, and tools that already send over SMTP or simple API calls. Dashboard visibility, support, alerting, and operational reporting matter more than owning every infrastructure component.
Best raw AWS email infrastructure for cost-sensitive teams
Amazon SES is the better fit when the team wants the lowest invoice cost and already has engineering capacity for AWS email operations. It requires ownership of identities, IAM, bounces, complaints, suppression syncing, logs, quotas, and sender reputation.
Best SaaS email platform for lifecycle messaging beyond relay
Sequenzy fits when the problem is not merely relaying email from existing systems. SaaS teams should consider it when transactional messages, campaigns, subscription events, and lifecycle journeys need one workflow instead of a generic relay or raw SES implementation.
Migration checklist
| Workstream | Moving toward SMTP2GO | Moving toward Amazon SES | Simplifying to Sequenzy |
|---|---|---|---|
| Sending domains | Recreate SPF, DKIM, DMARC, return paths, tracking domains, and sender identities. | Recreate SPF, DKIM, DMARC, return paths, tracking domains, and sender identities. | Configure sending domains for marketing and transactional email. |
| API and SMTP paths | Move SMTP credentials, API calls, templates, metadata, and webhook handlers. | Move SMTP credentials, API calls, templates, metadata, and webhook handlers. | Move transactional paths plus lifecycle campaign triggers. |
| Bounce and complaints | Confirm bounce, complaint, suppression, and unsubscribe processing. | Confirm bounce, complaint, suppression, and unsubscribe processing. | Import suppressions and validate transactional unsubscribe behavior where relevant. |
| Deliverability operations | Validate logs, retention, support, alerting, testing tools, and warmup process. | Validate logs, retention, support, alerting, testing tools, and warmup process. | Validate campaign, automation, and transactional reporting. |
| Cutover | Ramp traffic gradually and compare bounces, complaints, latency, and support response. | Ramp traffic gradually and compare bounces, complaints, latency, and support response. | Test lifecycle events and transactional sends before switching production traffic. |
Decision checklist
- Is the job only reliable email delivery, or does the team also need lifecycle campaigns?
- Which tool gives the right balance of support, logs, API ergonomics, and deliverability operations?
- Who owns bounce handling, complaint processing, suppression syncing, and sender reputation?
- Are the listed prices still realistic after adding engineering time and support needs?
- Would Sequenzy remove another marketing automation tool, or is infrastructure all that is needed?
