A solid influencer outreach subject line names the creator, says plainly what you are offering, and stays around 25 to 50 characters. Paste yours below to see which of seven written rules it meets and get scored variants. It checks writing rules; it does not predict replies.
Type or paste a subject line. The score is a count of rules met, listed in full below, and is not a prediction of replies. The detail fields are examples; replace them with yours.
Scored as you type. Nothing is sent anywhere.
37 characters, 7 words
Out of 100. Each row is one rule from the methodology table.
Passes our checklist
100 / 100
It clears most of our writing rules. Still read it aloud and ask whether you would open it.
Built from your details with fixed patterns, then scored with the same rules and sorted best first. Click "Test" to load one into the tester.
A high score only means the line meets the rules. Read it as the creator would before you send.
Once a creator replies yes, Seed sends them one branded link to pick a product and enter an address. A $0 draft order lands in your Shopify admin.
These six were scored by the same function that runs the tester, using the example details Maya, Acme Skin and Glow Serum. They show how the rules behave, not which line wins in your inbox. When you are ready to write the email body, use the outreach message generator.
| Subject line | Score | Why |
|---|---|---|
| Maya, free Glow Serum from Acme Skin? | 100 | Names the creator, says what is offered, plain language. |
| Can we send you Glow Serum? | 85 | Short and clear, but not personalised with a name. |
| Loved your skincare content, Maya | 85 | Personal, but does not say there is a gift. |
| Collaboration opportunity | 80 | Generic phrase, no name, no offer. |
| URGENT!!! 100% FREE GIFT - ACT NOW | 55 | Hits the caps, punctuation and spam-phrase rules. |
| Re: our chat | 44 | Fakes a reply thread, so it fails the honesty rule. |
No tool can promise replies. As a sound default, name the creator, say plainly what you are offering, keep it short enough for a phone screen, and avoid hype and fake reply prefixes. Test it by sending small batches and tracking your own open and reply rates rather than trusting any universal formula.
Our checklist treats 25 to 50 characters as the target. That is an assumption we chose, not a measured benchmark: mobile mail apps cut subjects off at different points, so shorter is safer. If your key words appear in the first few words, a slightly longer line can still work.
Usually yes. A name shows the email was written for them and not blasted to a list. If you are sending in bulk, use a merge tag and check that it fills in correctly before sending. A subject reading "Hi {name}" in a real inbox is worse than no personalisation.
Spam filters use many signals, including your sending domain, authentication and recipient behaviour, so a word list is only one small part. We flag a short list of hype phrases because they also make a pitch look generic to a human reader. Treat a flag as a prompt to reword, not a verdict.
No. Starting a subject with Re: or Fwd: to imply an earlier conversation is misleading. In the US, the FTC's CAN-SPAM guidance says commercial email must not use deceptive subject lines. It also damages trust with the very creator you are trying to win over.
Last updated: October 29, 2026
The tester applies seven fixed rules and adds up the points. The thresholds are our own writing judgement and editable assumptions, not benchmarks from a study. We do not have reply-rate data behind them.
| Rule | Points | How it is tested |
|---|---|---|
| Length | 20 | 25 to 50 characters scores full points; 15 to 24 or 51 to 65 scores 12; anything else scores 4. |
| Personalisation | 15 | Contains the creator's name (from the field above) or a merge tag like {name}, [Name] or {{first_name}}. |
| Clear about the offer | 15 | Contains an offer word (free, gift, send, try, collab, partnership, and similar) or your product name; naming only your brand scores 8. |
| Spam phrases | 20 | No phrases from our list scores 20; one scores 10; two or more scores 0. |
| Formatting | 15 | 5 points each for: no ALL-CAPS words of 3+ letters, at most one exclamation mark, at most one emoji. |
| Not misleading | 10 | Does not start with Re: or Fwd:. |
| Specific, not generic | 5 | Avoids stock phrases such as "collaboration opportunity" and "business proposal". |
Spam-phrase list (hand-written, illustrative, not exhaustive): act now, urgent, 100% free, guarantee, guaranteed, winner, you won, cash, $$$, click here, limited time, buy now, order now, congratulations, risk-free, risk free, earn money, make money, free money, once in a lifetime, exclusive deal, dear friend, no cost, double your, special promotion, final notice, don't miss. Real spam filters weigh many other signals such as sender reputation and authentication.
Build a gifting agreement in under a minute — deliverables, posting window, usage rights, and FTC disclosure. Copy it or save as PDF. Free, no email.
The same contract generator, pre-set for an Instagram deliverable: in-feed post plus story.
The same contract generator, pre-set for a TikTok deliverable.
A content-licensing agreement for UGC, not a posting agreement. Usage rights and deliverables only.
For unpaid product-gifting sends specifically: the gift, deliverables, and usage rights.
Send personalized bulk Instagram DMs to creators without copy-pasting one message at a time. Built for outreach at volume.
The Chrome extension behind the DM assistant above. Install it, connect your Seed account, send from your own session.
Put in your product cost, shipping, and creator count, and get your real cost per piece of content, including your own hours. Ungated.
How much should you pay an influencer? Enter views and a CPM to get a fair cash range, and see if your gifted product alone is a fair trade.
Work out a creator's engagement rate on Instagram, TikTok or YouTube, by followers and by views. Average up to 12 posts. Free, no email.
Build an influencer media kit with stats, audience, past collabs and rates. Live preview, three layouts, save as PDF. Free, no signup.
A UGC or influencer rate card with deliverables, usage rights, whitelisting and bundles. Preview it, then save as PDF. Free, no signup.
Three ready-to-send pitch emails (cold, warm, follow-up) for creators asking brands for PR packages or collabs. Free, no signup.
What can you actually earn on TikTok? Sponsored-post rate by tier, Creator Rewards eligibility, and a TikTok Shop affiliate estimate. Free, no signup.
Sponsored feed post, Reel and Story rate ranges by follower tier, plus an affiliate-earnings estimate. Free, no signup.
Score a creator's video against your brief in about two minutes. Free, no login.
Enter how many posts you want and get the number of creators to contact and gift, using your own acceptance and post rates.
Plan a gifting campaign budget: product, packaging and shipping cost by lane, total cost and cost per creator.
Compare the cost per 1,000 views and per content piece of influencer gifting against Meta and TikTok ads, with your own numbers.
Answer six questions to find the right influencer deal type for a creator: gifting, a flat fee, or affiliate commission.
Build a free influencer gifting application form with the exact fields to ask, then copy it or run it live on Shopify.
A free outreach CRM template with statuses, follow-up dates and notes. Download the CSV for Google Sheets or Excel.
Track sends, posts, discount codes, revenue and ROI with formulas built in. Download the CSV for Google Sheets.
Generate a one-page influencer brief: product, key messages, dos and don'ts, disclosure and deadlines. Free, no signup.
Generate a short outreach DM or email offering influencers a gifted product, in your own tone and language.
Pick a niche and platform for a hand-written hashtag set, mixed broad to niche. No made-up volume numbers.
Get a recommended monthly influencer budget, split across gifting, paid posts and UGC, from your revenue and stage.
Estimate the real cost of a PR package: product, box, inserts, packing materials and shipping.
Calculate what the content from your gifting campaign would cost to buy from an agency or UGC creators instead.
Estimate fair UGC rates from experience level, deliverables and usage rights, for brands and creators, sources linked.
Estimate fair YouTube sponsorship rates from a channel's average views, format and usage rights, sources linked.
Estimate expected reach for a creator's post, Reel or Story from follower count, using published benchmarks.
Calculate follower growth rate over any period and flag suspicious spikes between two checkpoints.
Enter a follower count to see its influencer tier under three published definitions, with typical CPM ranges.
Create $0 influencer orders in Shopify, tag them, and calculate the real COGS and shipping cost of every gift.
Generate hundreds of unique influencer discount codes from a prefix and download a CSV, ready for a Shopify bulk-codes app or the API.
Per-creator code conversion plus an estimate of the halo sales promo codes miss, with every assumption editable.
Paste your landing page and a list of creators and get one tagged UTM link per creator in bulk, as a CSV.
Price usage rights for creator content in ads: duration, channels and exclusivity, with editable percentages. Free, no signup.
Add the creator fee to your media spend to get blended CPM and CPA for TikTok Spark Ads or Meta partnership ads.
Turn a creator's fee and post stats into CPM, cost per engagement and cost per view, and compare with your own benchmark.
Estimate EMV from views, likes, comments and shares using values you set, plus an honest look at why EMV isn't revenue.
Find the most you can pay to acquire a customer through influencers, from your margin, repeat orders and target LTV:CAC ratio.
Find the highest affiliate commission you can pay influencers from your order value, costs and the profit you want to keep.
Build a tiered ambassador commission ladder from your margin, a starting rate and sales thresholds. Copy it or download CSV.
Work out ROI, ROAS and break-even revenue for a paid or gifted influencer campaign from your costs, commission and margin.
Get a step-by-step gifting campaign plan with dates and creator counts, from your goal, product and budget.
Score how well a creator fits your brand on a transparent, weighted checklist before you reach out.
Pick a launch date or holiday and get backward-planned recruit, ship and posting-window dates for 2026 and 2027.
See whether import VAT and duty likely apply when gifting product abroad, for the EU, UK, Switzerland and Norway, with official sources.
The regulator, required label and gifted-product rule in 10 countries, each with an official source. Not legal advice.
What the IRS, HMRC, CRA, ATO and other tax authorities say about gifted product as creator income, with sources. Not tax advice.
Share one branded link. The creator picks a product and types their address, and a $0 draft order lands in your Shopify admin.