An Allegrow alternative you pay for by the email
Allegrow is the closest tool on this site to what we do: it resolves catch-all addresses to valid or invalid, it names Mimecast and Proofpoint, and it claims 99% accuracy against our 98.5%. Half a point between two vendors measuring themselves is noise, so the honest difference is not the claim, it is the billing model and what else you are buying. Allegrow is a monthly seat-and-allowance product with sender reputation tooling attached. Giggal.ai is $9.90 per 10,000, once.
Bottom line
- Genuinely similar
- Both resolve catch-all to valid or invalid and both name secure email gateways. They claim 99%, we claim 98.5%.
- Billing
- Allegrow is $99 a month for 5,000 contacts plus $8 per extra 1,000. We are $9.90 per 10,000, bought once.
- Gateways named
- Allegrow names Mimecast and Proofpoint. We detect 15, Barracuda included.
- Scope
- Allegrow also does sender reputation and inbox placement work. We do not.
How Giggal.ai verifies catch-all addresses
Allegrow describes a proprietary signal-based process that goes beyond SMTP, and reports a study where it flagged 988 of 989 fictional addresses as invalid. That is a real methodology and worth reading, and more than we publish. Giggal.ai runs a deep mailbox existence check on the same class of address and returns valid or invalid rather than risky, across catch-all domains and 15 named secure email gateways. Both of us are solving the same problem; you should test both on your own list rather than take either claim at face value, which is why our free tier is 1,000 credits on a bulk upload.
| Result | Meaning |
|---|---|
| Deliverable | The mailbox exists and will accept mail |
| Undeliverable | The mailbox does not exist |
| Risky | The address exists but carries deliverability risk |
| Unknown | We could not verify the address, and the credit is refunded |
Allegrow pricing vs Giggal.ai
Allegrow starts with a 14-day trial covering up to 1,000 addresses. Starter is $99 a month for 5,000 contacts, with add-on credits at $8 per 1,000, so 10,000 in a month works out around $139 on their published rates. Scale Plus Unlimited is $1,340 a month billed annually for unlimited verification, which is the sensible route at high volume and has no equivalent here. Giggal.ai is pay-as-you-go: $9.90 for 10,000, $76 for 100,000, $680 for a million, bought once, credits never expire.
| Volume | Giggal.ai | Allegrow |
|---|---|---|
| 10,000 | $9.90 | $139/moest |
| 100,000 | $76 | $1,340/mo |
| 1,000,000 | $680 | $1,340/mo |
est Estimate from third-party sources, not confirmed on Allegrow’s pricing page.
Allegrow is a monthly subscription. Starter is $99 a month for 5,000 contacts, with add-on credits at $8 per 1,000, so 10,000 a month works out at $139; that is our arithmetic on their published rates, not a plan they list. The 100,000 and 1,000,000 rows are Scale Plus Unlimited at $1,340 a month billed annually, which is unlimited verification. Giggal.ai figures are one-time pay-as-you-go.
Allegrow pricing checked on 21 August 2026. Prices may have changed, see Allegrow’s pricing page.
Allegrow vs Giggal.ai
| Giggal.ai | Allegrow | |
|---|---|---|
| Price at 10,000 credits | $9.90 | $139/mo |
| Catch-all verification | Yes | Yes |
| Catch-all pricing | 1.5 credits in the same run, 2 credits standalone | 1 contact from the plan allowance |
| SEG verifier | 15 gateways | Yes |
| Credit expiry | Credits never expire, with no condition. | Plan allowance is monthly; the trial expires after 14 days |
| Free tier | 1,000 credits, no card, usable on bulk | 14-day trial covering up to 1,000 addresses |
| Charges for unknown results | No | - |
| Accuracy figure | Claims 98.5% | Claims 99% |
Allegrow is billed monthly. Its 100,000 and 1,000,000 figures are the Scale Plus Unlimited plan, which is unlimited verification at a flat annual rate.
Try it on your own list
- 1Export a list you already checked in Allegrow.
- 2Run it here on the 1,000 free credits. No card.
- 3Compare the catch-all and gateway rows against what Allegrow returned.
Frequently asked questions
They are the two closest tools on this list, so it comes down to billing and scope. Giggal.ai is pay-as-you-go at $9.90 per 10,000 with credits that never expire, and detects 15 secure email gateways. Allegrow is a monthly subscription that also does sender reputation scoring and inbox placement monitoring, which Giggal.ai does not.
Yes. Both return a valid or invalid result on accept-all domains instead of marking them risky. Allegrow claims 99% and we claim 98.5%, but both are vendor-measured on vendor-chosen samples, so half a point between them is not something to decide on. Run the same list through both instead. Giggal.ai gives 1,000 free credits on a bulk upload for exactly that.
Allegrow names Mimecast and Proofpoint. Giggal.ai detects 15 gateways including Proofpoint, Mimecast and Barracuda. If your list is heavy on enterprise domains, the wider gateway coverage is the practical difference.
Allegrow is $99 a month for 5,000 contacts with add-ons at $8 per 1,000, and an unlimited tier at $1,340 a month billed annually. Giggal.ai is $9.90 for 10,000 bought once, $76 for 100,000 and $680 for a million, with no subscription.
Yes. 1,000 free credits, no card, on a bulk upload, against Allegrow’s 14-day trial covering up to 1,000 addresses.
Same hard addresses, priced per email
1,000 free credits, no card required.