Tool Comparison
Diffchecker vs Semrush
- Paid from
- $15/mo
- Free plan
- Yes
- Platforms
- Web, Desktop, API
Best if
- You want the cheaper way in: plans start at $15/mo instead of $139/mo
- You want diff view.
- Paid from
- $139/mo
- Free plan
- Yes
- Platforms
- Web, Mobile, API
Best if
- You do a lot of your research from your phone
- You want app & website traffic, sheets / excel add-ins, and blogs.
Pick Diffchecker if
Diffchecker
Free • From $15/mo · Web · Desktop · API
- You want the cheaper way in: plans start at $15/mo instead of $139/mo
- You want diff view.
Pick Semrush if
Semrush
Free • From $139/mo · Web · Mobile · API
- You do a lot of your research from your phone
- You want app & website traffic, sheets / excel add-ins, and blogs.
Skip both if: Neither one clicks with how you research; there are strong third options.
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Our take
The bottom line
Diffchecker includes diff view, and Semrush includes app & website traffic and sheets / excel add-ins. On paper they're closely matched, so let pricing, platform fit, and the details below break the tie.
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Diffchecker
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Semrush
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Key differences at a glance
- Cheaper paid plan
- Diffchecker$15/mo vs $139/mo
- Mobile app
- Semrush
- Desktop app
- Diffchecker
- Free plan
- Both
What Diffchecker does best
- Comparison tools for text, Word documents, PDFs, Excel files, images, and folders from a web interface.
- Diffchecker can be used to review changed filing language, revised research notes, spreadsheet edits, model outputs, term sheets, or diligence documents.
- Tools for running desktop comparisons when confidential files should stay offline instead of being uploaded to the web app.
- Redline views, diff merging, real-time text comparison, dark mode, and PDF export on the plans that include them.
- AI difference summaries with limited free web uses and unlimited access on paid web plans.
What Semrush does best
- Analysis of website traffic, visitor sources, engagement, keywords, competitors, backlinks, SEO performance, paid search, and market benchmarks.
- Semrush One and AI visibility products to monitor brand and content visibility across AI search and classic SEO workflows.
- The Standard API for eligible SEO Toolkit Business users, with separately purchased API units and request or line-based consumption.
- Separate API paths for Trends, Listing Management, and Map Rank Tracker, noting that local APIs and map rank APIs have their own access and billing rules.
- Export support for data and reports through CSV, Excel, PDF, JSON, Google Sheets, Position Tracking, Site Audit, and App Center connector workflows.
Side by side
Pricing comparison
See for yourself
Side by side
Price, platforms, data, and market coverage.ShowHide
Side by side
| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • From $15/mo | Free • From $139/mo |
Free tier | Yes | Yes |
Free trial | 14 days | 7 days |
Plan limits | 6 limits: API Free: requests per month: 50, API Free: max request size: 5 MB +4 more | 8 limits: SEO: websites: 5, SEO: tracked keywords daily: 500 +6 more |
| Platforms & access | ||
Web app | Yes | Yes |
Desktop app | Yes | No |
Mobile app | No | Yes |
API access | Yes | Yes |
Integrations | iManage | Google Analytics, Google Search Console +1 more |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | — | — |
Categories covered | 2 | 4 |
Regions | — | North America, Europe, APAC, LatAm, Middle East, Africa |
| Data & capabilities | ||
Security | SSO: SAML | Data residency: US and SSO: SAML |
| Try it | Visit Diffchecker | Visit Semrush |
Standout features
The best features of Diffchecker and Semrush.ShowHide
Standout features
What Diffchecker does best
- Comparison tools for text, Word documents, PDFs, Excel files, images, and folders from a web interface.
- Diffchecker can be used to review changed filing language, revised research notes, spreadsheet edits, model outputs, term sheets, or diligence documents.
- Tools for running desktop comparisons when confidential files should stay offline instead of being uploaded to the web app.
- Redline views, diff merging, real-time text comparison, dark mode, and PDF export on the plans that include them.
- AI difference summaries with limited free web uses and unlimited access on paid web plans.
What Semrush does best
- Analysis of website traffic, visitor sources, engagement, keywords, competitors, backlinks, SEO performance, paid search, and market benchmarks.
- Semrush One and AI visibility products to monitor brand and content visibility across AI search and classic SEO workflows.
- The Standard API for eligible SEO Toolkit Business users, with separately purchased API units and request or line-based consumption.
- Separate API paths for Trends, Listing Management, and Map Rank Tracker, noting that local APIs and map rank APIs have their own access and billing rules.
- Export support for data and reports through CSV, Excel, PDF, JSON, Google Sheets, Position Tracking, Site Audit, and App Center connector workflows.
All details
Every attribute we track for Diffchecker and Semrush.ShowHide
All details
| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Other | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | Not specified | North AmericaEuropeAPACLatAmMiddle EastAfrica |
| Access & integrations | ||
API protocols | REST | REST |
API auth & delivery | Auth: APIKey | Auth: APIKey and OAuth2 |
Integrations | iManage | Google AnalyticsGoogle Search ConsoleGoogle Sheets |
Export formats | PDF | CSVExcelPDFJSON |
| Plans & trust | ||
Security & compliance | SSO: SAML | Data residency: USSSO: SAML |
Vendor & support | Checker Software Inc.Country: CanadaSupport: Email | Semrush Inc.Country: United StatesSupport: Email |
Curation ratings | Methodology 3/5Reliability 4/5UX 4/5 | Methodology 4/5Reliability 4/5UX 4/5 |
Green tags are exclusive to that tool in this comparison.
Pricing
Plans, billing, free trials, and monthly prices.ShowHide
Pricing
| Tier | ||
|---|---|---|
| Free plan | Free“Basic” | Free |
| Entry paid plan | $15/mo“Pro + Desktop” | $139/mo“SEO”websites: 5 · tracked keywords daily: 500 |
| Tier 2 | $20/mo“Legal” | $199/mo“Starter”websites: 5 · tracked keywords daily: 500 · +1 more |
| Tier 3 | $40/yr≈ $40/mo“Enterprise” | $299/mo“Pro+”websites: 15 · tracked keywords daily: 1,500 · +1 more |
| Tier 4 | $99/mo“API Standard”credits per month: 10,000 · max request size: 100 MB | $549/mo“Advanced” |
| Top plan | $299/mo“API Business”credits per month: 100,000 · max request size: 100 MB | — |
| Custom / enterprise | Contact sales“API Enterprise” | Contact sales“Enterprise” |
| Free trial | 14 days | 7 days |
Alternatives
Free alternatives
Questions we keep getting
What's the difference between Diffchecker and Semrush?
Diffchecker leans toward diff view and APIs & data feeds, while Semrush puts more weight on app & website traffic, APIs & data feeds, and sheets / excel add-ins. They overlap in 1 categories, so for most people it comes down to workflow preference and price.
How much do Diffchecker and Semrush cost?
Good news: both Diffchecker and Semrush have free plans, so you can run them side by side and only pay if you hit a wall.
Can I use Diffchecker or Semrush on my phone?
Semrush lists a dedicated mobile app, so it travels better. Diffchecker doesn't list a dedicated mobile app; its documented access is web, desktop, and API.
Do Diffchecker and Semrush have APIs?
Yes, both offer API access, so developers and quants can pull data programmatically or wire up their own integrations.
Should I choose Diffchecker or Semrush?
It depends on what you're after. Pick Diffchecker if diff view matter to you; go with Semrush if you'd rather have app & website traffic and sheets / excel add-ins. And if you only need the basics both share, let price decide.
Can I export data from Diffchecker and Semrush?
Semrush exports to CSV and Excel. Diffchecker is stingier about getting data out.
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Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.