SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.
SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.
Klaviyo records 6,674,207 monthly visits with +6.1% month-over-month growth and Paid pricing. Postel records 121,244 monthly visits with +5.8% growth and Free Trial, Paid pricing.

AI writing assistant that drafts and schedules social posts in your own voice
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | klaviyo.com | postel.app |
| Pricing Model | Paid | Free Trial, Paid |
| Monthly Visits | 6.67M (6,674,207) | 121.24K (121,244) |
| MoM Traffic Delta | +384.25K (+6.1%) | +6.68K (+5.8%) |
| Primary Market & Share | 🇺🇸 United States (38.7%) | 🇺🇸 United States (14.8%) |
| Direct Visits / mo | 4.43M | 21.61K |
| User Rating | 4.6 | 4.2 |
| Supported Platforms | Website | Website |

The AI-powered B2C CRM for email, SMS, and personalized marketing at scale
Every contact, event, and channel feeds one profile so segmentation, personalization, and reporting stay consistent.
An agent that plans calendars, drafts campaigns, audits flows, and recommends next actions using your business context.
Build campaigns and automated flows across email, SMS, RCS, WhatsApp, push, and social from one interface.
Forecast lifetime value, churn risk, and expected next purchase date to target the right customers at the right time.

AI writing assistant that drafts and schedules social posts in your own voice
Reads your historical posts to map line length, opening style, vocabulary and banned phrases so drafts sound like you.
Generates one drafted post for every day you normally publish and slots each into a calendar automatically.
Publishes to LinkedIn out of the box and connects X, Bluesky, Mastodon, TikTok and YouTube.
Accepts call notes, links, voice memos and podcast recordings as source material for new content.
SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.
SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.
Broader general-purpose email marketing features, but less specialized ecommerce data segmentation compared to Klaviyo.
Broader general-purpose email marketing features, but less specialized ecommerce data segmentation compared to Klaviyo.
Offers more integrated multi-channel tools like WhatsApp and live chat, but less advanced ecommerce predictive analytics.
Offers more integrated multi-channel tools like WhatsApp and live chat, but less advanced ecommerce predictive analytics.

Simpler and more affordable for basic newsletter design, but lacks advanced predictive segmentation and revenue analytics.
Simpler and more affordable for basic newsletter design, but lacks advanced predictive segmentation and revenue analytics.

Includes built-in landing page builders and webinars, but lacks Klaviyo's deep online store revenue attribution tracking.
Includes built-in landing page builders and webinars, but lacks Klaviyo's deep online store revenue attribution tracking.

SpecialistEmail marketing with AI send-time optimization to lift opens
SpecialistEmail marketing with AI send-time optimization to lift opens

Provides exceptionally powerful CRM automation workflows, but has a steeper learning curve for simple email campaigns.
Provides exceptionally powerful CRM automation workflows, but has a steeper learning curve for simple email campaigns.
Schedule and automate social media on 12 platforms — with AI agents that post for you
Schedule and automate social media on 12 platforms — with AI agents that post for you

Write, schedule, automate and analyse your X growth in one place
Write, schedule, automate and analyse your X growth in one place

AI social scheduler that writes your posts in your voice and publishes everywhere
AI social scheduler that writes your posts in your voice and publishes everywhere
AI tweet writing, scheduling, and bulk X account cleanup in one toolkit
AI tweet writing, scheduling, and bulk X account cleanup in one toolkit
Better native integration with WhatsApp and messaging channels for Shopify, but a smaller ecosystem of pre-built integrations.
Better native integration with WhatsApp and messaging channels for Shopify, but a smaller ecosystem of pre-built integrations.