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Catalog entry · InboxRatio Editorial

SparkPost (now Bird)

SparkPost was a transactional email platform whose brand has been retired following its acquisition by Bird: sparkpost.com now returns a permanent redirect to Bird's email product page, which we confirmed at source in August 2026. This catalog entry exists because search demand for the SparkPost name persists; the product itself is sold as Bird email today, and Bird's own catalog entry is the live listing. No separate pricing or deliverability test applies to the retired brand — any future test cycle would run against Bird.

Measurement status

Not yet tested

SparkPost has not yet been through our seed-list placement test. We publish measured deliverability data only — never estimates.

From our feature dataset

Deliverability capabilities audit

The 17 deliverability capabilities we check every vendor for — authentication help, IP management, list hygiene, and reputation tooling. This audits what SparkPost documents; it is separate from our tested deliverability ranking.

15 of 17 documented capabilities

  • Yes:

    SPF assistance

    Bounce-domain CNAME verification; legacy SparkPost SPF FAQ now 301s to Bird guide where return-path CNAME gives SPF alignment

  • Yes:

    DKIM setup

    'A valid DKIM record must be in the DNS for the sending domain'

  • Yes:

    DMARC support

    Not in SparkPost API docs; legacy SparkPost DKIM/SPF/DMARC FAQ URL now serves Bird guide requiring a DMARC record

  • Yes:

    Dedicated IP

    Sending IPs API manages your IPs and pool assignment; Enterprise IPs 'managed through your TAM'

  • Yes:

    Shared IP pools

    'shared pool' used for overflow during auto IP warmup; not available for Enterprise customers

  • Yes:

    IP warming

    Per-IP warmup with auto_warmup_stage 'between 1 and 29'

  • Yes:

    Automated warmup

    'auto_warmup_enabled' flag runs a staged ramp with overflow to shared pool

  • Yes:

    IP pools management

    Create/delete pools and assign IPs; 'default' pool cannot be deleted

  • Yes:

    Bounce management

    Bounce events with 'Classification code'; hard bounces auto-added to suppression list

  • Yes:

    Suppression lists

    Suppression list auto-adds hard bounces, spam complaints and unsubscribes; transactional vs non-transactional

  • Yes:

    Complaint management

    spam_complaint events; complainers automatically added to suppression list

  • Yes:

    Feedback loop handling

    FBL signing domain 'used only for emails to domains that require DKIM for FBL'; spam_complaint events

  • Partial:

    Reputation monitoringpartial

    Bounce, complaint and delay metrics by mailbox provider and domain; no health score documented

  • Not documented:

    Blacklist monitoringnot documented

    not in developers.sparkpost.com API overview; legacy blocklist support page now 301s to bird.com/en-us/products/email/inbox-tracker — searched 2026-09-10

  • Partial:

    Deliverability analyticspartial

    Seed List API for inbox placement is 'available to the SparkPost Deliverability Add-On customers only'

  • Not documented:

    Deliverability consultingnot documented

  • Yes:

    Domain authentication guidance

    'we recommend configuring DKIM for your sending domains and configuring a bounce domain'

Items marked — are not documented by the vendor. In this category, silence is itself a signal. How we read vendor claims: methodology.

From our feature dataset

SparkPost feature matrix

What the vendor documents, category by category. ◐ marks tier-gated or limited capabilities; — means the vendor does not document it.

Email6 of 6 documented
  • Partial:

    Marketing campaignspartial

    API-only: suppressions distinguish 'non-transactional' campaign emails, stored recipient lists; no campaign builder in documented scope

  • Yes:

    Transactional email

    Transmissions API for transactional sending; sparkpost.com now 301s to bird.com/products/email

  • Yes:

    SMTP relay

    'Host smtp.sparkpostmail.com', ports 587/2525, AUTH LOGIN with API key, STARTTLS

  • Yes:

    Bulk sending

    Stored 'Recipient Lists' used with Transmissions for multi-recipient sends

  • Yes:

    Email templates

    Templates API plus Snippets and a template language

  • No:

    Drag-and-drop editor

    Documented scope is a delivery API (Sending, Analytics, Accounts, Receiving); templates stored as content via API, no visual editor

Automation6 of 6 documented
  • No:

    Email sequences

    API overview covers Sending, Analytics, Accounts, Receiving only; no sequences in documented scope

  • No:

    Drip campaigns

    no drip/automation feature in documented API scope

  • Partial:

    Event-based automationpartial

    Sends triggered by your own application via Transmissions API; 'Event Webhooks' push events back; no built-in triggers

  • No:

    Behavioral automation

    no behavioral automation in documented API scope

  • No:

    Workflow builder

    no workflow builder in documented API scope

  • No:

    Conditional logic

    no workflow branching in documented API scope (template if/else is content-level, see dynamic_content)

AI1 of 6 documented
  • Not documented:

    AI email generationnot documented

  • Not documented:

    AI subject linesnot documented

  • Not documented:

    AI content optimizationnot documented

  • Not documented:

    AI segmentationnot documented

  • Not documented:

    AI campaign recommendationsnot documented

  • Partial:

    AI agent / assistantpartial

    Official MCP server (Bird MCP server (com.bird/mcp)) lets external AI assistants act on the account; no native in-product agent documented

Personalization3 of 4 documented
  • Partial:

    Segmentationpartial

    Static 'Recipient Lists' only; no rule-based segments in documented API

  • Yes:

    Dynamic content

    Template language if/else, each loops and 'render_dynamic_content()' macro

  • Yes:

    Personalization variables

    'pass in JSON data to a template through both the transmission and individual recipient'

  • Not documented:

    Behavioral targetingnot documented

Analytics3 of 4 documented
  • Yes:

    Opens & clicks

    Metrics API: count_rendered / unique opens and count_clicked / count_unique_clicked

  • Not documented:

    Conversion trackingnot documented

  • Yes:

    Campaign reporting

    Metrics API aggregates delivery, engagement, bounce and complaint counts; campaign IDs set per transmission or X-MSYS-API header

  • Partial:

    Deliverability analyticspartial

    Metrics by mailbox provider; inbox/spam placement (count_inbox_panel) only for 'Deliverability Add-On' customers

Developer features5 of 5 documented
  • Yes:

    API

    REST API: Transmissions, Templates, Metrics, Events, Subaccounts, Inbound Domains and more

  • Yes:

    SMTP API

    SMTP injection with X-MSYS-API header for campaign, metadata, tags, IP pool

  • Yes:

    Webhooks

    'Batches of events are delivered through a POST request'; retried for 8 hours

  • Yes:

    SDKs / client libraries

    'several official and community supported client libraries' (e.g. SparkPost/node-sparkpost, python-sparkpost, php-sparkpost on GitHub)

  • Yes:

    Public API docs

    Public API reference at developers.sparkpost.com (still served, HTTP 200)

Marketing platform7 of 7 documented
  • No:

    CRM

    email delivery API scope (Sending, Analytics, Accounts, Receiving); no CRM

  • No:

    Signup forms

    email delivery API scope; no signup forms

  • No:

    Popups

    email delivery API scope; no popups

  • No:

    Landing pages

    email delivery API scope; no landing pages

  • No:

    Chatbots

    email delivery API scope; no chatbots

  • No:

    SMS

    SparkPost API is email-only; multichannel is sold under the Bird brand (see bird entry)

  • No:

    Other channels

    SparkPost API is email-only; multichannel is sold under the Bird brand (see bird entry)

E-commerce4 of 5 documented
  • No:

    Store integrations

    email delivery API scope; no store integrations documented

  • No:

    Cart recovery

    email delivery API scope; no abandoned-cart feature

  • No:

    E-commerce automation

    email delivery API scope; no e-commerce automation

  • Not documented:

    Purchase trackingnot documented

  • No:

    Product recommendations

    email delivery API scope; no product recommendations

Features checked 10 September 2026 · from vendor documentation and official feature pages.

AI & agent readiness · checked 2026-09-10

SparkPost and AI agents

71/100AI-native

Official MCP server · hosted, connect by URL

AI agents and assistants can work with SparkPost directly through Bird MCP server (com.bird/mcp): Hosted https://mcp.bird.com (Streamable HTTP, OAuth) or local stdio via bird CLI: send/receive email, SMS, WhatsApp, voice; channel setup; workspace inspection

Scored 0–100 from public evidence: an official MCP server weighs most (40, +5 when hosted), then official agent skills, AI assistant apps, AI-friendly docs and built-in AI features. "Not found" means we couldn't locate it on SparkPost's public pages or the official MCP registry, not that it can't exist. This is context, never part of the Deliverability Score.

Captured from the vendor website

SparkPost in screenshots

Bird website: Email API product hero section

Bird Email API product page (SparkPost successor), August 2026

Source: vendor website · 22 August 2026

Bird website: email deliverability features section

Deliverability feature list on the Bird Email API page

Source: vendor website · 22 August 2026

Independent review platforms — shown as context; never part of our measured Deliverability Score

What users say

Trustpilot

1.5/5

74 reviews

Checked 10 September 2026

G2

4.0/5

73 reviews

Checked 10 September 2026

Capterra

3.7/5

35 reviews

Checked 10 September 2026

Weighted average 2.5/5 across 182 reviews.Limited review base

Trustpilot counts for half of the average: it is an open platform where businesses can't remove negative reviews. G2 and Capterra share the other half, and a platform with fewer than 100 reviews counts proportionally less.

Same primary category, from our catalog

Alternatives to SparkPost

Elastic Email

$$

Email platform selling a transactional API and a marketing product separately; slated for both test protocol lines.

View profile →

Brevo

$$

Email marketing plus transactional email and SMTP relay on one platform; the European demand anchor in our catalog.

View profile →

SendGrid

$$

Transactional email API and SMTP service operated by Twilio, with a separate Marketing Campaigns product; the transactional demand anchor.

View profile →

Selected by catalog rule — same primary category, same depth tier first, then catalog demand order. Never hand-picked.

Generated from our datasets — every value verified and dated

Frequently asked questions

What is SparkPost?

SparkPost is a transactional email service in the InboxRatio catalog. Its regional focus is Global.

Does SparkPost document its deliverability capabilities?

SparkPost documents 15 of the 17 deliverability capabilities we audit every vendor for (authentication help, IP management, list hygiene, reputation tooling). This audits what the vendor documents — it is separate from our measured Deliverability Score, and undocumented items are themselves a signal. How we read vendor claims.

What do users say about SparkPost?

Across 182 reviews on Trustpilot, G2 and Capterra, SparkPost averages 2.5/5, with Trustpilot counting for half of the average. User ratings are shown as context only — never part of our measured Deliverability Score.

Has SparkPost's deliverability been tested by InboxRatio?

Not yet — SparkPost is in the queue for Cycle 0, our first seed-list test cycle across the whole catalog. We publish measured inbox-placement results only after a completed cycle, so this profile carries no Deliverability Score until then. How we test.

What are the main SparkPost alternatives?

From our catalog, the closest alternatives are Elastic Email, Brevo and SendGrid — services sharing SparkPost's primary category (transactional email), selected by a neutral catalog rule, never hand-picked.