{
  "$schema_note": "Cost-comparison slice. For the full Tool schema use /api/categories/{slug}.json or /api/tools/{slug}.json.",
  "feed_version": "1",
  "generated_at": "2026-05-08T18:47:16.513Z",
  "site": "https://tiergauge.com",
  "license": "CC BY 4.0 with attribution to TierGauge.",
  "category": {
    "slug": "transactional-email",
    "display": "Transactional email",
    "description": "API-driven email for receipts and notifications."
  },
  "count": 4,
  "page_url": "https://tiergauge.com/pricing/transactional-email/",
  "tools": [
    {
      "slug": "mailgun",
      "name": "Mailgun",
      "primary_category": "transactional-email",
      "match": "primary",
      "starting_price_usd_cents": 0,
      "free_plan_available": true,
      "last_verified": "2026-04-30T21:00:00.000Z",
      "plans": {
        "free": {
          "name": "Free",
          "slug": "free",
          "is_free": true,
          "monthly_usd_cents": 0,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 3000,
              "unit": "emails (100/day cap, 30-day conversion)"
            }
          },
          "source_url": "https://www.mailgun.com/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "entry_paid": {
          "name": "Basic",
          "slug": "basic",
          "is_free": false,
          "monthly_usd_cents": 1500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 10000
            }
          },
          "source_url": "https://www.mailgun.com/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "mid_tier": {
          "name": "Foundation",
          "slug": "foundation",
          "is_free": false,
          "monthly_usd_cents": 3500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 50000
            }
          },
          "source_url": "https://www.mailgun.com/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        }
      },
      "page_url": "https://tiergauge.com/tools/mailgun/"
    },
    {
      "slug": "mailtrap",
      "name": "Mailtrap",
      "primary_category": "deliverability",
      "match": "secondary",
      "starting_price_usd_cents": 0,
      "free_plan_available": true,
      "last_verified": "2026-04-30T21:00:00.000Z",
      "plans": {
        "free": {
          "name": "Free",
          "slug": "free",
          "is_free": true,
          "monthly_usd_cents": 0,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 4000
            }
          },
          "source_url": "https://mailtrap.io/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "entry_paid": {
          "name": "Basic",
          "slug": "basic",
          "is_free": false,
          "monthly_usd_cents": 1500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 100000,
              "unit": "emails (entry $15 covers 10k; scales to $30 at 100k)"
            }
          },
          "source_url": "https://mailtrap.io/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "mid_tier": {
          "name": "Business",
          "slug": "business",
          "is_free": false,
          "monthly_usd_cents": 8500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 750000,
              "unit": "emails (entry $85 covers 100k; scales to $450 at 750k)"
            }
          },
          "source_url": "https://mailtrap.io/pricing/",
          "captured_at": "2026-04-30T21:00:00.000Z"
        }
      },
      "page_url": "https://tiergauge.com/tools/mailtrap/"
    },
    {
      "slug": "postmark",
      "name": "Postmark",
      "primary_category": "transactional-email",
      "match": "primary",
      "starting_price_usd_cents": 0,
      "free_plan_available": true,
      "last_verified": "2026-04-30T21:00:00.000Z",
      "plans": {
        "free": {
          "name": "Free",
          "slug": "free",
          "is_free": true,
          "monthly_usd_cents": 0,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 100
            }
          },
          "source_url": "https://postmarkapp.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "entry_paid": {
          "name": "Basic",
          "slug": "basic",
          "is_free": false,
          "monthly_usd_cents": 1500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 10000
            }
          },
          "source_url": "https://postmarkapp.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "mid_tier": {
          "name": "Pro",
          "slug": "pro",
          "is_free": false,
          "monthly_usd_cents": 1650,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 10000
            }
          },
          "source_url": "https://postmarkapp.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        }
      },
      "page_url": "https://tiergauge.com/tools/postmark/"
    },
    {
      "slug": "resend",
      "name": "Resend",
      "primary_category": "transactional-email",
      "match": "primary",
      "starting_price_usd_cents": 0,
      "free_plan_available": true,
      "last_verified": "2026-04-30T21:00:00.000Z",
      "plans": {
        "free": {
          "name": "Free",
          "slug": "free",
          "is_free": true,
          "monthly_usd_cents": 0,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 3000,
              "unit": "emails (100/day cap)"
            }
          },
          "source_url": "https://resend.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "entry_paid": {
          "name": "Pro 50k",
          "slug": "pro-50k",
          "is_free": false,
          "monthly_usd_cents": 2000,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 50000
            }
          },
          "source_url": "https://resend.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        },
        "mid_tier": {
          "name": "Pro 100k",
          "slug": "pro-100k",
          "is_free": false,
          "monthly_usd_cents": 3500,
          "limits": {
            "contacts": null,
            "emails_per_month": {
              "kind": "number",
              "value": 100000
            }
          },
          "source_url": "https://resend.com/pricing",
          "captured_at": "2026-04-30T21:00:00.000Z"
        }
      },
      "page_url": "https://tiergauge.com/tools/resend/"
    }
  ]
}