Read Rate vs. Open Rate

Read rate measures whether a message was verifiably read, for example through the blue double ticks on WhatsApp. Open rate estimates whether an email was opened, using an invisible tracking pixel whose reliability has dropped sharply since Apple Mail Privacy Protection. Two metrics, two measurement methods, and no direct like-for-like comparison.

Read rate vs. open rate: what is the difference?

Read rate and open rate are two engagement metrics that people often use as if they meant the same thing, even though they measure in completely different ways. If you compare channels such as the WhatsApp Business API and email, you need to know the difference, or you end up comparing apples with oranges.

The read rate is the share of messages that were read. It belongs to messaging channels like WhatsApp, Telegram or SMS and, where the channel supports it, rests on a technical read receipt. On WhatsApp, two blue ticks show that the recipient opened the chat. That is a real read receipt, not an estimate.

The open rate comes from email marketing and measures how many recipients opened a message. It is tracked with an invisible 1x1 pixel in the HTML body of the email: when the recipient’s mail client loads images, the pixel is requested and an open is recorded. A neat solution, with two structural weaknesses.

Why the two metrics are not comparable

First: since 2021, Apple Mail Privacy Protection (MPP) preloads tracking pixels in the background, even when the user never opens the email. Apple Mail opens are therefore reported at close to 100%, whether or not anyone read the message. Reported open rates have been inflated ever since.

Second: people who block images in their email client never show up in the statistics, even if they read the message. Plain-text emails carry no pixel at all.

On WhatsApp, the blue double tick only appears once the recipient actively opens the chat. There is no automatic prefetch, no image blocking and no inbox sorting in between. What counts as read was actually read. The only gap is users who switched read receipts off, and they drop out of the measurement entirely.

Realistic ranges

Sources: industry benchmarks for WhatsApp, DMA and Mailchimp email benchmarks, Gartner and CTIA for SMS. The WhatsApp range is wide because the read rate depends heavily on three factors: opt-in quality, list segmentation and trust in the sender. The 98% often quoted for WhatsApp is the top of that range. A broad marketing send to an unsegmented list often lands at 65 to 80%, while a well-targeted service message to active customers reaches 95 to 98%. More in the glossary: WhatsApp broadcast, opt-in and segmentation.

What this means for channel comparisons

An email open rate of 25% and a WhatsApp read rate of 95% are not directly comparable, because the methods differ. Still, even if you correct the WhatsApp read rate down to a conservative 65 to 80% (the realistic floor for broad broadcasts), it sits at roughly three times the email average. The structural lead is real, even if 98% does not apply to every campaign.

For small and mid-sized businesses this means WhatsApp complements email rather than replacing it. Email remains the digital marketing channel with the widest reach and the best-documented return on investment. WhatsApp wins on visibility and speed of response, wherever a message has to land quickly and a reply is expected.

Measuring reads with SendSeven

In SendSeven, every WhatsApp message carries its delivered and read status, the analytics dashboard shows sent and delivered volumes per channel, and email campaigns report opens and clicks. Your unified inbox keeps the replies from all channels in one place, so you can see how WhatsApp broadcasts, email campaigns and SMS sends actually perform without juggling spreadsheets from three tools.