SparkPost (Bird) to AWS SES Migration
Migrating from SparkPost (Bird) to AWS SES
SparkPost was acquired by MessageBird and rebranded as Bird. Many teams are using the disruption as an opportunity to re-evaluate their email infrastructure. This guide covers the migration to AWS SES — pricing, API mapping, analytics alternatives, and what you will need to build.
SparkPost was acquired by MessageBird in 2021 and rebranded as Bird in 2023. For many teams, the acquisition is a forcing function: if you chose SparkPost for focused email infrastructure and now find yourself on a multichannel platform with a different pricing model and product direction, it is a reasonable time to re-evaluate. AWS SES offers significantly lower costs and native AWS integration for teams already in the AWS ecosystem. ## The Acquisition Context SparkPost was built by the engineering team behind Message Systems (PowerMTA), which was the gold standard in high-volume email infrastructure. The technical foundation is strong. The organizational disruption is real. Bird (the combined entity) is building toward a unified multichannel messaging platform — email, SMS, WhatsApp, push notifications. For teams that chose SparkPost specifically for email deliverability and want an email-focused infrastructure provider, the fit has changed. ## Pricing: Bird vs AWS SES Bird's pricing structure is more complex post-acquisition and includes platform fees that go beyond per-email costs. | Volume | Bird / SparkPost | AWS SES | Monthly Savings | | ---------------- | ------------------------- | ------------- | --------------- | | 10,000 emails | ~$45/month (starter plan) | $1.00/month | $44.00 | | 50,000 emails | ~$45/month (included) | $5.00/month | $40.00 | | 100,000 emails | ~$85/month | $10.00/month | $75.00 | | 500,000 emails | ~$250/month | $50.00/month | $200.00 | | 1,000,000 emails | ~$450/month | $100.00/month | $350.00 | SES charges $0.10 per 1,000 emails. Bird charges vary based on plan tier and include platform fees for the multichannel product whether you use those features or not. At high volume, SES is consistently 4–9x cheaper. ## API Migration: SparkPost Transmission API → SES SparkPost's Transmission API and SES SendEmail API are structurally different but functionally equivalent. | SparkPost Transmission API | AWS SES Equivalent | Notes | | ----------------------------------------- | --------------------------------------------------- | ---------------------------------- | | `POST /api/v1/transmissions` | `SendEmail` / `SendBulkEmail` | Core send operation | | `recipients[]` with `address` | `Destination.ToAddresses[]` | Direct mapping | | `content.from`, `content.subject` | `Source`, `Message.Subject` | Same fields | | `content.html`, `content.text` | `Message.Body.Html`, `Message.Body.Text` | Direct mapping | | `substitution_data` (template vars) | Application-rendered HTML or SES template variables | Move rendering to app layer | | `options.click_tracking`, `open_tracking` | Configuration Set with tracking enabled | Same capability, config-level | | `campaign_id`, `description` | Configuration Set tags, message tags | For event filtering and CloudWatch | | REST API key auth | IAM access key + secret or SES SMTP credentials | IAM preferred for AWS-native apps | | SMTP (smtp.sparkpostmail.com, port 587) | `email-smtp.[region].amazonaws.com`, port 587 | Drop-in SMTP credential swap | For bulk sends to large recipient lists, map SparkPost's `recipients[]` array to SES `SendBulkEmail` with a `Destinations[]` array. The SES bulk send API supports up to 50 destinations per call; loop and batch for larger lists. ## SparkPost Signals → SES + Custom Analytics SparkPost Signals is one of the platform's strongest differentiators. It provides: - Aggregate engagement metrics (open rate, click rate, bounce rate by campaign, domain, sending IP) - Engagement-based suppression (automatic suppression of chronically unengaged recipients) - Spam trap monitoring - A/B testing for subject lines and content SES does not have an equivalent analytics product. You build it from the event stream. **Recommended architecture to replicate Signals:** | Signals Feature | SES Equivalent Architecture | Build Effort | | --------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | ----------------- | | Aggregate engagement metrics (sends, opens, clicks) | SNS events → Lambda → DynamoDB aggregates → CloudWatch custom metrics | Medium | | Per-campaign open/click rates | Tag messages with ConfigurationSet tags → filter SNS events by tag → aggregate in DynamoDB | Medium | | Engagement-based suppression | Lambda pre-send check: query DynamoDB for last open/click timestamp → skip if >90 days | Medium–High | | Bounce rate by domain | SNS Bounce events → Lambda → group by recipient domain in DynamoDB → CloudWatch metric | Medium | | Spam trap monitoring | No direct equivalent — use third-party inbox monitoring (250ok, GlockApps, or Validity) | External tool | | A/B testing | Application-layer split: send variant A to 50% of recipients, variant B to other 50%; tag with ConfigurationSet tags | Application-layer | | Unengaged recipient suppression | Scheduled Lambda: query DynamoDB for recipients with no open/click in 90+ days → add to suppression list | Medium–High | | Deliverability dashboard | QuickSight or Grafana dashboard over aggregated DynamoDB/S3 data | High (one-time) | ## Related Comparisons Explore other technical comparisons: - [SendGrid to AWS SES](/compare/sendgrid-to-aws-ses) - [Mailgun to AWS SES](/compare/mailgun-to-aws-ses) ## Why Choose FactualMinds for Your Email Migration FactualMinds is an **AWS Select Tier Consulting Partner** specializing in email infrastructure migration. We have executed SendGrid, Mailgun, Postmark, and SparkPost to AWS SES migrations and know exactly where teams get stuck. - **Email migration experts** — we handle domain verification, DKIM, bounce architecture, IP warming - **Assessment-first approach** — we map your current state before writing a line of infrastructure code - **Zero-downtime cutover planning included** — no failed deliveries during migration - **AWS Select Tier Partner** — [verified on AWS Partner Network](https://partners.amazonaws.com/partners/001aq000008su2EAAQ/Factual%20Minds) ---
SparkPost was acquired by MessageBird in 2021 and rebranded as Bird in 2023. For many teams, the acquisition is a forcing function: if you chose SparkPost for focused email infrastructure and now find yourself on a multichannel platform with a different pricing model and product direction, it is a reasonable time to re-evaluate. AWS SES offers significantly lower costs and native AWS integration for teams already in the AWS ecosystem.
The Acquisition Context
SparkPost was built by the engineering team behind Message Systems (PowerMTA), which was the gold standard in high-volume email infrastructure. The technical foundation is strong. The organizational disruption is real. Bird (the combined entity) is building toward a unified multichannel messaging platform — email, SMS, WhatsApp, push notifications. For teams that chose SparkPost specifically for email deliverability and want an email-focused infrastructure provider, the fit has changed.
Pricing: Bird vs AWS SES
Bird’s pricing structure is more complex post-acquisition and includes platform fees that go beyond per-email costs.
| Volume | Bird / SparkPost | AWS SES | Monthly Savings |
|---|---|---|---|
| 10,000 emails | ~$45/month (starter plan) | $1.00/month | $44.00 |
| 50,000 emails | ~$45/month (included) | $5.00/month | $40.00 |
| 100,000 emails | ~$85/month | $10.00/month | $75.00 |
| 500,000 emails | ~$250/month | $50.00/month | $200.00 |
| 1,000,000 emails | ~$450/month | $100.00/month | $350.00 |
SES charges $0.10 per 1,000 emails. Bird charges vary based on plan tier and include platform fees for the multichannel product whether you use those features or not. At high volume, SES is consistently 4–9x cheaper.
API Migration: SparkPost Transmission API → SES
SparkPost’s Transmission API and SES SendEmail API are structurally different but functionally equivalent.
| SparkPost Transmission API | AWS SES Equivalent | Notes |
|---|---|---|
POST /api/v1/transmissions | SendEmail / SendBulkEmail | Core send operation |
recipients[] with address | Destination.ToAddresses[] | Direct mapping |
content.from, content.subject | Source, Message.Subject | Same fields |
content.html, content.text | Message.Body.Html, Message.Body.Text | Direct mapping |
substitution_data (template vars) | Application-rendered HTML or SES template variables | Move rendering to app layer |
options.click_tracking, open_tracking | Configuration Set with tracking enabled | Same capability, config-level |
campaign_id, description | Configuration Set tags, message tags | For event filtering and CloudWatch |
| REST API key auth | IAM access key + secret or SES SMTP credentials | IAM preferred for AWS-native apps |
| SMTP (smtp.sparkpostmail.com, port 587) | email-smtp.[region].amazonaws.com, port 587 | Drop-in SMTP credential swap |
For bulk sends to large recipient lists, map SparkPost’s recipients[] array to SES SendBulkEmail with a Destinations[] array. The SES bulk send API supports up to 50 destinations per call; loop and batch for larger lists.
SparkPost Signals → SES + Custom Analytics
SparkPost Signals is one of the platform’s strongest differentiators. It provides:
- Aggregate engagement metrics (open rate, click rate, bounce rate by campaign, domain, sending IP)
- Engagement-based suppression (automatic suppression of chronically unengaged recipients)
- Spam trap monitoring
- A/B testing for subject lines and content
SES does not have an equivalent analytics product. You build it from the event stream.
Recommended architecture to replicate Signals:
| Signals Feature | SES Equivalent Architecture | Build Effort |
|---|---|---|
| Aggregate engagement metrics (sends, opens, clicks) | SNS events → Lambda → DynamoDB aggregates → CloudWatch custom metrics | Medium |
| Per-campaign open/click rates | Tag messages with ConfigurationSet tags → filter SNS events by tag → aggregate in DynamoDB | Medium |
| Engagement-based suppression | Lambda pre-send check: query DynamoDB for last open/click timestamp → skip if >90 days | Medium–High |
| Bounce rate by domain | SNS Bounce events → Lambda → group by recipient domain in DynamoDB → CloudWatch metric | Medium |
| Spam trap monitoring | No direct equivalent — use third-party inbox monitoring (250ok, GlockApps, or Validity) | External tool |
| A/B testing | Application-layer split: send variant A to 50% of recipients, variant B to other 50%; tag with ConfigurationSet tags | Application-layer |
| Unengaged recipient suppression | Scheduled Lambda: query DynamoDB for recipients with no open/click in 90+ days → add to suppression list | Medium–High |
| Deliverability dashboard | QuickSight or Grafana dashboard over aggregated DynamoDB/S3 data | High (one-time) |
Related Comparisons
Explore other technical comparisons:
Why Choose FactualMinds for Your Email Migration
FactualMinds is an AWS Select Tier Consulting Partner specializing in email infrastructure migration. We have executed SendGrid, Mailgun, Postmark, and SparkPost to AWS SES migrations and know exactly where teams get stuck.
- Email migration experts — we handle domain verification, DKIM, bounce architecture, IP warming
- Assessment-first approach — we map your current state before writing a line of infrastructure code
- Zero-downtime cutover planning included — no failed deliveries during migration
- AWS Select Tier Partner — verified on AWS Partner Network
Frequently Asked Questions
What happened to SparkPost?
SparkPost was acquired by MessageBird in 2021 and rebranded as Bird (formerly MessageBird) in 2023. The combined platform covers email, SMS, WhatsApp, and other messaging channels under a unified brand. Existing SparkPost customers have been migrated to the Bird platform, which retains the core email infrastructure but operates under new pricing, branding, and product direction. Many SparkPost customers — particularly those who chose SparkPost specifically for email and do not need multichannel messaging — have used the acquisition and rebranding as a trigger to evaluate alternatives, including AWS SES.
Is Bird (SparkPost) good for transactional email?
Bird retains SparkPost's underlying email infrastructure, which was built by former Message Systems engineers and is technically strong. Deliverability is good, the Transmission API is well-documented, and SparkPost Signals (now part of Bird Analytics) provides sophisticated engagement analytics. The concerns are organizational rather than technical: pricing complexity has increased post-acquisition, the product roadmap now prioritizes multichannel features over email-only capabilities, and some customers report support quality changes. For teams that need email only and are already on AWS, the acquisition is a reasonable trigger to migrate to SES.
How do I migrate from SparkPost to AWS SES?
The migration involves four main tracks: (1) Domain and IP setup — verify your sending domain in SES, warm dedicated IPs if needed; (2) API migration — map SparkPost Transmission API calls to SES SendEmail/SendBulkEmail; (3) Event pipeline — replace SparkPost webhooks with SES Configuration Set event publishing to SNS, then subscribe Lambda or an HTTP endpoint; (4) Analytics — replace SparkPost Signals with a custom event aggregation pipeline using SNS, Lambda, and a data store of your choice (DynamoDB, RDS, or S3 + Athena). The API migration is the fastest part; building the analytics replacement takes the most time if you relied heavily on Signals engagement data.
Does AWS SES have analytics like SparkPost?
Not out of the box. SparkPost Signals provides engagement analytics, engagement-based suppression (automatically suppressing unengaged recipients), and A/B testing. SES provides per-event delivery notifications via SNS (delivery, bounce, complaint, open, click) but no aggregated analytics UI. To replicate Signals functionality: route SNS events to Lambda → store in DynamoDB or S3 → visualize in QuickSight or Grafana. Engagement-based suppression requires a custom Lambda that checks open/click history before each send and skips unengaged addresses. This is buildable but requires engineering investment. If engagement analytics are a core requirement and you lack the bandwidth to build the pipeline, evaluate whether Bird or another full-featured ESP better fits your current needs.
Is SparkPost being discontinued?
No. SparkPost's email infrastructure continues to operate under the Bird brand. The SparkPost.com domain now redirects to Bird, and existing accounts and APIs continue to function. What changed is the brand, the pricing model, and the product direction — Bird is positioning as a multichannel customer engagement platform, not a focused email infrastructure provider. The API endpoints, SMTP relay addresses, and webhook formats from SparkPost continue to work, but new features are built around the Bird platform's multichannel vision rather than email-only improvements.
Need Help Migrating to AWS SES?
FactualMinds is an AWS Select Tier Partner specializing in email infrastructure migration. We handle domain verification, Configuration Set architecture, bounce handling, IP warming, and cutover.