How to write a survey email subject line that gets opened

A survey's response rate starts before the first question: it starts with whether the person opens the email. A generic subject line ("Satisfaction survey") competes in the inbox with dozens of other emails and almost always loses. The survey content can be excellent and never matter, because nobody got far enough to see it.

What works

• Being specific about how long it takes: "2 minutes: your take on [product]" is more honest and gets opened more than a vague subject.
• Naming the company or person behind the request, if there's a prior relationship: "Help us improve, [Name]" works better coming from someone recognizable than a generic sender.
• Using a direct question instead of a statement: "How easy was your purchase?" generates more curiosity than "Purchase satisfaction survey".
• Mentioning the incentive if there is one, directly: "Your feedback + $50 giveaway" performs better than burying the incentive in the body.

What tanks the open rate

• Generic subjects like "Survey" or "We value your feedback" — they look exactly like any other mass email.
• ALL CAPS or multiple exclamation points — triggers spam filters and looks like spam even when it isn't.
• Promising "just 30 seconds" when the survey actually takes 5 minutes — it works the first time; the second time that person no longer trusts the sender.
• Subjects that are too long and get cut off in the mobile preview — the important part needs to be in the first 40-50 characters.

The sender matters as much as the subject

An email arriving from the company's own domain (surveys@yourcompany.com) builds more trust and gets better deliverability than one arriving from a generic survey platform. In SurvIQ, this is set up by connecting your own email account via SMTP from Settings, so every survey sends from your domain, not the tool's.

Testing before sending to the whole list

If you're sending to a large list, testing two subject line versions on a small group before sending to the rest (even something as simple as manually comparing the open rate of two small sends) avoids committing the whole campaign to one version with no data.

The subject gets the open, the content keeps them

A good subject line only gets the email opened — the completion rate from there depends on how well the survey itself is designed (length, question clarity, how closely the first question matches what the subject promised).