High-volume, low-cost cloud email service from AWS used for transactional (and marketing) sends with API and SMTP interfaces.
Rank HistoryAVG#1.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.64.7
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.9.5%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.58%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#1.5
Widely used transactional + marketing email platform with robust APIs, templates, and deliverability tooling.
Rank HistoryAVG#1.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.66.5
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.9.0%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.60%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#1.5
Developer-focused email API and SMTP relay optimized for transactional messages, parsing, and deliverability.
Rank HistoryAVG#3.1
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.68.4
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.8.6%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.65%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#3.1
Provider focused specifically on transactional email — known for fast delivery and strong deliverability practices for product emails.
Rank HistoryAVG#4
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.64.1
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.8.1%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.63%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#4
Email delivery platform and API used for transactional and high-volume sending with analytics and deliverability features.
Rank HistoryAVG#5.3
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.61.3
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.7.6%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.37%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#5.3
Newer developer-centric transactional email API with simple DX (SDKs, webhooks) and growing popularity for product emails.
Rank HistoryAVG#6.1
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.64.2
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.7.1%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.52%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#6.1
Transactional email API and SMTP relay aimed at developers and product teams; part of the Mailer family of products.
Rank HistoryAVG#7.7
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.72.6
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.6.7%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.100%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#7.7
All‑in‑one marketing platform that also provides a transactional email API/SMTP (rebranded from Sendinblue to Brevo).
Rank HistoryAVG#8.2
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.60.8
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.6.2%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.57%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#8.2
Transactional + marketing email platform with API and SMTP relay aimed at teams that want both campaign and transactional capabilities.
Rank HistoryAVG#12.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.43.6
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.5.7%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.42%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#12.5
SMTP relay and transactional email provider focused on reliable delivery, straightforward setup and logging.
Rank HistoryAVG#13.2
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.56.1
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.5.2%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.100%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#13.2
Transactional and marketing email API/S MTP provider (part of Netcore) with emphasis on deliverability, real‑time analytics and affordable pricing.
Rank HistoryAVG#12.6
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.44.4
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.4.8%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.31%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#12.6
Affordable email delivery platform offering transactional API and SMTP relay for developers and businesses.
Rank HistoryAVG#10.6
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.66.1
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.4.3%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.100%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#10.6
SMTP relay and email API provider that supports separation of transactional and marketing streams, with deliverability services.
Rank HistoryAVG#14.4
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.56.8
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.3.8%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.71%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#14.4
Mailchimp’s transactional email offering (formerly Mandrill) available as an add‑on to Mailchimp accounts for API/SMTP transactional sends.
Rank HistoryAVG#8.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.53.4
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.3.3%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.49%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#8.5
Zoho’s dedicated transactional email service (API/SMTP) focused on fast delivery for OTPs, confirmations and password resets with stream separation and analytics.
Rank HistoryAVG#15.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.46.7
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.2.9%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.52%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#15.5
Longstanding SMTP relay and transactional email delivery provider used by enterprises and smaller senders.
Rank HistoryAVG#15
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.56.8
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.2.4%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.100%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#15
Originally an email sandbox for development and testing; also offers production delivery/relay and deliverability monitoring for transactional sends.
Rank HistoryAVG#13.3
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.54.7
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.1.9%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.72%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#13.3
Multichannel platform (email, SMS, push) offering SMTP/API transactional email, templates and tracking suitable for SMBs and apps.
Rank HistoryAVG#17.5
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.34.5
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.1.4%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.49%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#17.5
AI‑native email platform that unifies transactional and lifecycle/marketing flows (API + SMTP) — positioned for SaaS teams wanting billing‑aware, event‑driven messaging.
Rank HistoryAVG#19
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.45.0
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.1.0%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.100%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#19
Lightweight transactional email API (JSON‑based) for developers with hosted templates, personalization and delivery analytics.
Rank HistoryAVG#18.8
Serplock RatingSerplock Rating is our score for how visible a brand is in ChatGPT for this category. Higher is better. The highest scores belong to brands ChatGPT recommends most often here.19.0
Share of VoiceShare of Voice is a brand's share of recommendations compared to other brands in this category. Higher is better. A leading share means ChatGPT points users to that brand more than competitors.0.5%
ConsistencyConsistency is how often ChatGPT includes a brand in this category from week to week. Higher is better. Reliable presence means steady visibility in AI answers.17%
Average AI RankAverage AI Rank is the typical position ChatGPT gives a brand in this category over time. Lower is better. Brands users hear about most often rank closer to #1.#18.8
