InboxGreen vs GlockApps

Inbox placement testing vs email authentication fixing - which do you actually need?

Short answer: GlockApps sends test emails to real seed accounts across Gmail, Outlook, Yahoo, and others and tells you whether they landed in inbox, spam, or promotions. InboxGreen checks whether your SPF, DKIM, and DMARC records are configured correctly - which is the root cause for most authentication-related deliverability problems. If emails are going to spam, fix authentication first with InboxGreen, then confirm inbox placement with GlockApps.

GlockApps

Inbox placement tester

Sends test emails to seed accounts at 90+ mailbox providers. Shows whether your email landed in inbox, spam, or promotions at each provider. Requires sending an actual test email.

Free: limited tests

Paid from ~$9/month (100 tests)

InboxGreen

Email authentication fix kit

Checks SPF, DKIM, and DMARC records directly in DNS without sending a test email. Generates copy-paste fix records for Cloudflare, Namecheap, and other DNS providers.

Free check - no account needed

FixKit $29 one-time - Monitor from $19/mo

Feature comparison

Feature InboxGreen GlockApps
SPF / DKIM / DMARC check Yes - direct DNS lookup Shows results from test email headers
Inbox placement test (Gmail, Outlook, Yahoo) No Yes - 90+ mailbox providers
Requires sending a test email No Yes
Copy-paste DNS fix records Yes - FixKit No
Spam filter trigger analysis No Yes - SpamAssassin, Barracuda
Email content analysis No Yes - HTML, links, images
Blacklist check Free - try it Yes
DMARC monitoring + email alerts Yes - from $19/mo Limited monitoring features
SPF / DMARC / DKIM generators Yes - free tools No generators
White-label PDF reports Yes - Agency plan Not available
One-time payment option Yes - FixKit $29 Subscription only
No account required Yes Account required

When to use GlockApps

  • Your authentication is solid but you want to confirm inbox placement at Gmail, Outlook, Yahoo, and others before sending a campaign.
  • You are an email marketer who needs to test inbox vs promotions tab placement.
  • You want to know if your email content or HTML triggers spam filters at specific providers.
  • You are warming up a new IP or domain and want to track inbox placement over time.

When to use InboxGreen

  • You need to check and fix SPF, DKIM, or DMARC for your domain without sending a test email.
  • Emails are going to spam and you suspect it is an authentication configuration issue.
  • You need exact DNS records to copy into your DNS provider to fix authentication.
  • You want daily monitoring and alerts when your DNS records change or break.
  • You manage deliverability for multiple clients and need white-label reports.

Pricing comparison

GlockApps pricing starts at around $9/month for 100 inbox placement tests. Higher tiers go up to $79/month for unlimited tests. Tests are consumed each time you check, which adds up quickly for teams sending frequently.

InboxGreen pricing:

  • Free: Full SPF/DKIM/DMARC domain check, 11+ free tools - no signup required.
  • FixKit ($29 one-time): Copy-paste DNS records + PDF guide. No subscription needed.
  • Monitoring ($19/month): Daily checks, email alerts when records break, up to 5 domains.
  • Agency ($99/month): Up to 30 domains, white-label PDF deliverability reports.

For fixing authentication issues, InboxGreen's $29 one-time FixKit covers the most common use case without any subscription.

Check your domain's email authentication free - no account needed.
See SPF, DKIM and DMARC status in seconds and get exact fix records if anything is wrong.
search Run Free Domain Check payments See Pricing

Frequently asked questions

What is the difference between inbox placement testing and email authentication checking?

Email authentication checking (SPF, DKIM, DMARC) verifies whether your DNS records are correctly configured so receiving servers trust your email. Inbox placement testing sends an actual email to seed accounts and shows whether it landed in inbox, spam, or promotions at each mailbox provider. Authentication is foundational - if it is broken, inbox placement tests will show consistent spam placement.

Is GlockApps worth it for small businesses?

GlockApps is most valuable for email marketers sending campaigns at volume who need to confirm inbox placement before each send. For small businesses whose main problem is email authentication configuration (SPF, DKIM, DMARC), InboxGreen is more directly useful and significantly cheaper.

What is the best GlockApps alternative for DNS authentication?

InboxGreen is the most focused alternative for checking and fixing SPF, DKIM, and DMARC. It covers authentication without requiring a test send, generates fix records, and monitors for changes.

Do I need both GlockApps and InboxGreen?

They cover different things, so using both makes sense if you manage email campaigns at scale. Fix authentication issues first with InboxGreen, then confirm inbox placement with GlockApps. For small businesses and developers, InboxGreen's free tier covers the authentication check without needing GlockApps at all.