Data verified September 25, 2026
QuickMail vs Success.ai
QuickMail is cheaper at entry level for one seat (cheapest paid plan): $49 per month against $99. For a 50-inbox stack the full monthly cost is $806.12 with QuickMail and $537.47 with Success.ai. QuickMail wins 2 of our 8 comparison points, Success.ai wins 1, 2 are ties.
Data verified · Sources: QuickMail pricing, Success.ai pricing, Methodology
Verdict
Who wins, point by point
| Dimension | QuickMail | Success.ai | Winner |
|---|---|---|---|
| Cheapest paid plan for 1 seat (per month) | $49 (Starter Plan, billed monthly) | $99 (Starter, billed monthly) | QuickMail |
| Cheapest paid plan for 5 seats (per month) | $49 (Starter Plan, billed monthly) | $99 (Starter, billed monthly) | QuickMail |
| Free plan | Not published | No | Not comparable |
| Email sender limit | Unlimited | Unlimited | Tie |
| Warmup included | Yes | Yes | Tie |
| Email verification | Not published | Included | Not comparable |
| CRM | Not published | Included | Not comparable |
| G2 rating | 4.7 (112 reviews, 2025-11-19) | 4.9 (258 reviews, 2026-01-08) | Success.ai |
The differences
What the numbers say
For 1 seat, QuickMail's cheapest paid plan costs $49 per month against $99.
For 5 seats, QuickMail's cheapest paid plan costs $49 per month against $99.
Success.ai rates 4.9 on G2 against 4.7.
We cannot compare free plan, email verification, CRM, because at least one of the two vendors does not publish it.
Across a full 50-inbox stack (mailboxes, domains, warmup, verification, CRM), Success.ai costs $268.65 less per month.
$806.12
$537.47
Every plan
Plan by plan, side by side
QuickMail: 3 plans
| Starter Plan | Growth Plan | Agency Plan | |
|---|---|---|---|
| Price, billed monthly | $49/mo | $99/mo | $299/mo |
| Email sender limit | Unlimited | Unlimited | Unlimited |
| Warmup: accounts warmed at once | Yes | Yes | Yes |
| Emails per month | 5,000 | 100,000 | 500,000 |
| Team seats | Unlimited | Unlimited | Unlimited |
Sources: quickmail.com/pricing
Success.ai: 3 plans
| Starter | Growth | Enterprise | |
|---|---|---|---|
| Price, billed monthly | $99/mo | $199/mo | Custom |
| Price, billed annually (per month) | $74/mo | $149/mo | Custom |
| Warmup: accounts warmed at once | Yes | Yes | Yes |
| Emails per month | 50,000 | 150,000 | Unlimited |
| Lead-search credits per month | 6,000 | 10,000 | Not published |
| CRM | Yes | Yes | Yes |
| Unibox (shared reply inbox) | Yes | Yes | Yes |
Sources: www.success.ai/pricing
When to pick which
Pick QuickMail if…
- Its pricing page targets agencies, small teams, LinkedIn + email outreach, which Success.ai's does not.
- It wins on cheapest paid plan for 1 seat (per month), cheapest paid plan for 5 seats (per month).
Pick Success.ai if…
- Its pricing page targets solo founders, B2B sales teams, enterprise teams, which QuickMail's does not.
- It wins on G2 rating.
You ask, we answer
Common questions
Is QuickMail cheaper than Success.ai?
Yes at entry level: $49 vs $99 per month for one seat.
How much warmup do QuickMail and Success.ai include?
QuickMail: yes. Success.ai: yes.
How many email senders can I connect to QuickMail or Success.ai?
QuickMail: unlimited. Success.ai: unlimited.
Do QuickMail and Success.ai include email verification?
QuickMail: not published. Success.ai: included.
Do QuickMail and Success.ai have a built-in CRM?
QuickMail: not published. Success.ai: included.
Which is rated higher on G2, QuickMail or Success.ai?
QuickMail: 4.7 (112 reviews, 2025-11-19). Success.ai: 4.9 (258 reviews, 2026-01-08).