Plunk vs Robly

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Plunk

See full pricing history

USD · US · source: www.useplunk.com

Plan	Pricing	Charged by	Offer type
Free forever	Free 1,000 emails / mo	Flat · 1,000 emails / mo	Standalone · Free
Pay as you grow	USD 0 per email $0.001 / email	Usage · email	Standalone · Usage based

Robly

See full pricing history

USD · US · source: www.robly.com

Plan	Pricing	Charged by	Offer type
Up to 500 contacts	USD 19 monthly · USD 15 / month with annual commitment $19/month or $15/month on annual billing	Usage · per stated usage allowance	Standalone · Fixed
501 to 2,500 contacts Highlighted	USD 35 monthly · USD 29 / month with annual commitment $35/month or $29/month on annual billing	Usage · per stated usage allowance	Standalone · Fixed
2,501 to 5,000 contacts	USD 58 monthly · USD 49 / month with annual commitment $58/month or $49/month on annual billing	Usage · per stated usage allowance	Standalone · Fixed

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Plunk

Free forever

Highlights No credit card required: Included
Highlights Transactional emails: Included
Highlights Workflow automation: Included
Highlights Campaign broadcasts: Included
Highlights Custom domains: Included
Highlights Click & open tracking: Included
Highlights Unlimited contacts: Included
Highlights Plunk branding on emails: Included

Pay as you grow

Highlights Everything in Free: Included
Highlights No Plunk branding: Included
Highlights Monthly spend cap: Included
Highlights Unlimited emails: Included

Robly

Up to 500 contacts

Plan card Up to 500 contacts: Included
Plan card Unlimited emails: Included
Plan card A/B testing: Included
Plan card Detailed reports: Included

501 to 2,500 contacts

Plan card Up to 2,500 contacts: Included
Plan card Email automation: Included
Plan card Contact segmentation: Included
Plan card Signup forms: Included

2,501 to 5,000 contacts

Plan card Up to 5,000 contacts: Included
Plan card Deliverability optimization: Included
Plan card Autoresponders: Included
Plan card Custom branding: Included

How their prices changed

Each date shows when a public price was observed, not when it took effect. An archived region or currency can differ, so a currency change is not necessarily a price increase.

Plunk

September 21, 2026
Official pricing page
- Free forever: Free
- Pay as you grow: USD 0 per email
August 27, 2026
Official pricing page
- Free — Free: Free
- Paid — Pay as you grow: $0.001 per email

Robly

August 27, 2026
Official pricing page
- Up to 500 contacts: USD 19 monthly · USD 15 / month with annual commitment
- 501 to 2,500 contacts: USD 35 monthly · USD 29 / month with annual commitment
- 2,501 to 5,000 contacts: USD 58 monthly · USD 49 / month with annual commitment