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Index › Developer platform › October 2026 Edition

Secure code training

Asked as “secure code training platform”, and as “developer security training”, on behalf of a mid-market B2B company. 50 first choices recorded across the direct, paraphrase, budget and scale prompts, fourteen models each. Added to the October 2026 Edition on October 4, 2026; its answers are read by the distilled judge (ai-indexes-judge-qwen3-14b-run3), not the claude-opus-5 judge of the earlier categories: how the two compare.
Standing · first-choice share
26%
Contested · Secure Code Warrior 18%
26SecureFlag18Secure Code Warrior12SafeStack Academy44others

26% of first choices, contested.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment; they sit side by side and are never added together.

The standing

Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all fourteen models, for a mid-market B2B company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrantSince September 2026
01SecureFlag26%2%48accepted challengernewNew since September 2026: not ranked then, 26% now.
02Secure Code Warrior18%20%51accepted challengernewNew since September 2026: not ranked then, 18% now.
03SafeStack Academy12%0%20accepted challengernewNew since September 2026: not ranked then, 12% now.
04Security Journey4%3%37accepted challengernewNew since September 2026: not ranked then, 4% now.
05Snyk Learn2%0%17accepted challengernewNew since September 2026: not ranked then, 2% now.
Show the two products at 0%, ordered by negative rate
07Veracode Security Labs0%11%19accepted challengernewNew since September 2026: not ranked then, 0% now.
06Avatao0%0%17accepted challengernewNew since September 2026: not ranked then, 0% now.

The floor is 11 points of share, measured: how far the models move a leader on their own when the same questions are asked twice with nothing changed. A larger change is movement; a smaller one is noise, and both are shown. Movement is read over the twelve models both editions asked; GPT-6 Luna, Muse Glimmer 30B joined this edition and are in the standing but not yet in the comparison. How the floor is measured

Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its product page.
All ten head-to-head pages: the top five products, each against each

Recommended versus criticized

Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.

Criticized challengerCriticized default
Negative label rate →
01
02
03
04
05
A06
07
Accepted challengerEndorsed leader
0%First-choice share → · lines at 30% share and 25% negative40%
Key
01SecureFlag26%
02Secure Code Warrior18%
03SafeStack Academy12%
04Security Journey4%
05Snyk Learn2%
06Avatao0%
07Veracode Security Labs0%

What they warned about

Five of fourteen models held their first choice under the paraphrase. Claude Haiku 4.5, Perplexity Sonar, Grok 4.1 Fast, Mistral Small, Llama 4 Maverick, Qwen 3.7 Flash, Kimi K2, GLM 4.7 FlashX and MiniMax M2.5 changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.
Secure Code Warrior
20%
10 of 51 labels negative · 7 of 14 models · 2 hard negative
“Secure Code Warrior has the most consistent negative feedback and is the one I'd be most cautious about.” DeepSeek V4 Flash, negative prompt
SANS
75%
3 of 4 labels negative · 3 of 14 models
“Premier traditional option; ideal for teams wanting structured classroom-style courses (more expensive)” Qwen 3.7 Flash, paraphrase prompt
Veracode Security Labs
11%
2 of 19 labels negative · 2 of 14 models
“Veracode Security Labs is more of a "high-cost, high-friction" concern than a quality problem per se.” DeepSeek V4 Flash, negative prompt
Black Duck
100%
1 of 1 labels negative · 1 of 14 models · 1 hard negative
“Avoid high-end like Synopsys or Checkmarx Codebashing ($1K+/user or bundled).” Grok 4.1 Fast, budget prompt

What they cite

Citations exist only for the models that return a source list: fourteen of the fourteen in this edition, and all six flagship models on the expanded tier.

Sites the answers cite

76 of 84 answers in this category came back with a source list, from 14 of 14 models: citations where the model returns them, or the search results it consulted. 1017 links across 152 sites, every framing counted. Ranked by the number of answers carrying the site or page. None of the 252 answers across every segment cited this index's own page for the category.

vendor site · RansomLeak49 answers · 50 citations · 11 models
vendor site · SourceForge47 answers · 90 citations · 12 models
41 answers · 44 citations · 13 models
vendor site · G240 answers · 95 citations · 13 models
vendor site · Security Journey33 answers · 55 citations · 12 models
vendor site · Secure Code Warrior30 answers · 47 citations · 11 models
25 answers · 32 citations · 10 models
vendor site · SecureFlag25 answers · 28 citations · 12 models
24 answers · 28 citations · 9 models
vendor site · SecureFlag23 answers · 37 citations · 11 models
22 answers · 28 citations · 11 models
18 answers · 38 citations · 11 models

Pages the answers cite

The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.

Search against answers

Each company's standing in the answers beside its site's footprint in Google search, one row a site: the products the models named on it with their shares, and the share they add up to; monthly searches on Google, and DataForSEO's estimate of AI search demand (modeled from search signals, directional, not a count of queries to any assistant), for the most-searched of the company's and its products' names (the name is in each row's hover text); estimated monthly organic visits to the site; and its best position in Google's top ten for “best secure code training platform”, “secure code training platform”, “secure code training platforms”. US estimates from DataForSEO and Google's Ads Transparency Center. A small company's site, or a mid-sized company's site for its flagship, is marked company; a product on a large parent's site (Google, Microsoft) has no site figures. A column with no figures for this category is left out, and an empty cell means none were seen, not none exist. Two measurements side by side: neither is read as the cause of the other.
Company and productsShareOwn site citedName searches, GoogleAI search demand, est.Organic visitsPaid search a month, est.Google ads, last 30 daysBest Google position
SecureFlag secureflag.com26%1554800935$9488
Secure Code Warrior securecodewarrior.com18%1491,000222,80272
SafeStack Academy safestack.io12%51100921
PortSwigger Web Security Academy portswigger.net8%131,000489,623
RansomLeak ransomleak.com6%2210046
Security Journey securityjourney.com4%11839081,490105
Snyk snyk.io
Snyk Learn 2%
2%5512,10058161,651 company60
Wizer wizer-training.com2%516,600605,3970
OWASP Secure Coding Dojo owasp.org2%15200365,2228
Anagram Security2%

Google's top ten for the three searches hold 21 sites; 6 of them are among the sites the models cited here (blog.secureflag.com, gartner.com, reddit.com, securecodewarrior.com, secureflag.com, securityjourney.com). The first result for “best secure code training platform” is safestack.io.

How they answered

Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.
ShowHide
ModelDirect“What is the best secure code training platform for a mid-market B2B company?”Paraphrase“Which developer security training would you recommend to a mid-sized B2B company?”Comparative“What are the top secure code training platforms and how do they differ?”Budget-constrained“What is the best secure code training platform for a company with a limited budget?”Scale-constrained“We are a 500 person company evaluating a secure code training platform. What should we look at?”Negative“Which secure code training platforms should I avoid or be cautious about?”
Claude Haiku 4.5Secure Code Warrior
Two alternativesAppSecEngineer, SecureFlag
no first choiceChangedagainst: SANSSecure Code Warrior Learning Platform
Four alternativesCodebashing, RansomLeak, Security Journey, Veracode Security Labs
SafeStack Academy
Four alternativesCode Review Lab, Snyk Learn, SonarQube, Wizer
no first choicenothing named
GPT-5.4 miniSecureFlag
Two alternativesImmersive, Secure Code Warrior
SecureFlagHeld
Two alternativesOWASP Secure Coding Dojo, SANS
SecureFlag
Four alternativesOWASP Secure Coding Dojo, Secure Code Warrior, Security Journey, Veracode Security Labs
SecureFlag’s Small Business Training plan
Three alternativesOWASP Security Knowledge Framework, OWASP Security Shepherd, Snyk Learn
against: Secure Code Warrior
no first choiceagainst: Secure Code Warrior, secure-codes.com
Gemini 3.5 FlashSecure Code Warrior
Three alternativesAppSecEngineer, SecureFlag, Security Journey
Secure Code WarriorHeld
Three alternativesSecureFlag, Security Journey, Snyk Learn
no first choice
Six alternativesAppSecEngineer, Checkmarx Codebashing, Secure Code Warrior, SecureCodingHub, SecureFlag, Snyk Learn
OpenSSF "Developing Secure Software", PortSwigger Web Security Academy
Four alternativesHacksplaining, OWASP Secure Coding Dojo, Snyk Learn, TryHackMe
against: Immersive Labs, Secure Code Warrior
Secure Code Warrior
Four alternativesImmersive Labs, SecureFlag, Snyk Learn, Veracode Security Labs
against: SANS Security Awareness
Perplexity SonarSecureFlag
One alternativeSecure Code Warrior
Veracode Developer TrainingChanged
Two alternativesSANS Developer Security Awareness Training, SecureFlag
Secure Code Warrior, SecureFlag
Five alternativesAppSecEngineer, Checkmarx Codebashing, SafeStack Academy, Security Journey, Veracode Security Labs
G2-listed platform
Two alternativesOWASP, SourceForge-listed tools
no first choicenothing named
Grok 4.1 FastSecureFlag Secure Coding Training
Two alternativesSecure Code Warrior, Security Journey
against: Veracode Security Labs
Practical DevSecOpsChanged
Three alternativesAvatao, OWASP, Security Journey
against: Coursera, SANS Developer Security Training
Secure Code Warrior, SecureFlag
Four alternativesAvatao, SafeStack Academy, Security Journey, Veracode Security Labs
OWASP Secure Coding Dojo
Four alternativesAvatao, Hacksplaining, Kontra, Secure Code Warrior
against: Black Duck, Checkmarx Codebashing
Secure Code Warrior
Two alternativesSecureFlag, Security Journey
against: SANS, Secure Code Warrior, Udemy
Mistral SmallRansomLeak, SecureFlag, Security Journeyno first choiceChangedSecure Code Warrior
Two alternativesAvatao, SafeStack Academy
SafeStack Academy, Wizer
Three alternativesAvatao, Cybrary, SecureCodingHub
no first choicenothing named
DeepSeek V4 FlashSecureFlag
Two alternativesSecure Code Warrior, Security Journey
SecureFlagHeld
One alternativeSecurity Journey
against: Secure Code Warrior
Secure Code Warrior, SecureFlag
Three alternativesHackerOne Security Knowledge Platform, SafeStack Academy, Veracode Security Labs
PortSwigger Web Security Academy
Two alternativesOpenSSF, SecureFlag
Secure Code Warrior
Four alternativesCheckmarx Codebashing, SecureFlag, Security Journey, Veracode Security Labs
against: Secure Code Warrior, SecureFlag, Veracode Security Labs
Llama 4 MaverickSecureFlagno first choiceChangedno first choiceno first choiceno first choicenothing named
Qwen 3.7 FlashSecureFlag
Three alternativesCheckmarx Codebashing, SafeStack Academy, Security Journey
SafeStack Academy, Secure Code WarriorChanged
Four alternativesAvatao, SecureFlag, Security Journey, Symbiotic Security
against: SANS
Codebashing
Three alternativesSafeStack Academy, Security Journey, Veracode Security Labs
PortSwigger Web Security Academy
Three alternativesCoursera, GitHub Security Lab, OWASP WebGoat
against: Secure Code Warrior, Snyk Training
no first choiceagainst: Code Nation, Coding Dojo, Secure Code Warrior
Kimi K2Security Journey
Three alternativesCheckmarx Codebashing, Secure Code Warrior, SecureFlag
SafeStack Academy, Top 10 Dev TrainingChanged
Three alternativesSANS Institute – Developer Security Training, Secure Code Warrior, Veracode Security Labs
Secure Code Warrior
Five alternativesAvatao, Kontra, SecureFlag, Security Journey, Veracode Security Labs
RansomLeak, SafeStack Academy
Three alternativesPortSwigger Web Security Academy, Semgrep Academy, Snyk Learn
no first choiceagainst: KnowBe4, Secure Code Warrior
GLM 4.7 FlashXSecureFlag
Two alternativesSecure Code Warrior, Security Journey
no first choiceChanged
Three alternativesHackTheBox, SANS Cyber Aces, TryHackMe
Secure Code Warrior, SecureFlag
Four alternativesAnagram Security, Avatao, Checkmarx Codebashing, Veracode Security Labs
GitHub Secure Code Game, OpenSSF Linux Foundation Education
Three alternativesRansomLeak Training, SafeStack Academy, SecureFlag
no first choicenothing named
MiniMax M2.5SecureFlag
Four alternativesSafeStack Academy, Secure Code Warrior, Security Journey, Wizer
Anagram Security, SecureFlagChanged
Two alternativesBSG Secure Development Lifecycle Training, Offensive360
no first choiceRansomLeak, SafeStack Academy
Two alternativesSAFECode, Snyk Learn
no first choicenothing named
GPT-6 LunaSecureFlag
Two alternativesSecure Code Warrior, Snyk Learn
SecureFlagHeld
Two alternativesPortSwigger Web Security Academy, Secure Code Warrior
Secure Code Warrior, SecureFlag
Three alternativesKontra, PortSwigger Web Security Academy, Security Journey
Snyk Learn
One alternativeSecureFlag Training
no first choiceagainst: OWASP Secure Coding Dojo
Muse Glimmer 30BSecure Code Warrior
One alternativeSecureFlag
Secure Code WarriorHeld
Two alternativesAvatao, SANS Developer Security Training
Secure Code Warrior, SecureFlag - OWASP
Two alternativesSecurity Journey, Snyk Learn
PortSwigger Web Security Academy
Seven alternativesDVWA, OWASP Juice Shop, OWASP's own site, OpenSSF / Linux Foundation Education free courses, Security Journey, Snyk Learn, Wizer
no first choiceagainst: Secure Code Warrior, Security Journey
Bold is the first choiceAlternatives are counted; the count opens them.What the answer argued against

The record

One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency. Full answer text is in the free responses file. Download the record
Eighty-four rows: every prompt, every model, every answer.
PromptModelVersion stringTime (UTC)SearchedSourcesLatency
Direct recommendationClaude Haiku 4.5claude-haiku-4-5-202510012026-10-05 01:26yes168 s
Direct recommendationGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-04 23:38yes35 s
Direct recommendationGemini 3.5 Flashgemini-3.5-flash2026-10-05 01:30yes933 s
Direct recommendationPerplexity Sonarsonar2026-10-04 23:57yes163 s
Direct recommendationGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-05 01:40yes2010 s
Direct recommendationMistral Smallmistral/mistral-small via mistral2026-10-05 01:08yes53 s
Direct recommendationDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-04 22:50yes2132 s
Direct recommendationLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-04 22:24yes51 s
Direct recommendationQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-04 23:20yes1126 s
Direct recommendationKimi K2moonshotai/kimi-k2 via novita2026-10-04 23:38yes1324 s
Direct recommendationGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-05 01:05yes2328 s
Direct recommendationMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-05 01:47yes1036 s
Direct recommendationGPT-6 Lunagpt-6-luna2026-10-05 01:30yes416 s
Direct recommendationMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-05 00:02yes1519 s
ParaphraseClaude Haiku 4.5claude-haiku-4-5-202510012026-10-05 00:34no05 s
ParaphraseGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-04 22:12yes45 s
ParaphraseGemini 3.5 Flashgemini-3.5-flash2026-10-04 23:51yes1223 s
ParaphrasePerplexity Sonarsonar2026-10-05 01:16yes144 s
ParaphraseGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-04 22:59yes2310 s
ParaphraseMistral Smallmistral/mistral-small via mistral2026-10-05 00:16no03 s
ParaphraseDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-04 23:01yes2237 s
ParaphraseLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-05 01:10yes52 s
ParaphraseQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-04 22:36yes826 s
ParaphraseKimi K2moonshotai/kimi-k2 via novita2026-10-04 23:52yes1325 s
ParaphraseGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-05 00:52no09 s
ParaphraseMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-04 23:05yes516 s
ParaphraseGPT-6 Lunagpt-6-luna2026-10-05 00:14yes419 s
ParaphraseMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-04 23:04yes1219 s
ComparativeClaude Haiku 4.5claude-haiku-4-5-202510012026-10-05 00:13yes169 s
ComparativeGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-05 01:22yes49 s
ComparativeGemini 3.5 Flashgemini-3.5-flash2026-10-05 00:37yes1440 s
ComparativePerplexity Sonarsonar2026-10-05 01:24yes175 s
ComparativeGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-05 01:23yes179 s
ComparativeMistral Smallmistral/mistral-small via mistral2026-10-05 00:30yes1416 s
ComparativeDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-05 01:48yes2242 s
ComparativeLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-04 22:57yes52 s
ComparativeQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-04 23:32yes1528 s
ComparativeKimi K2moonshotai/kimi-k2 via novita2026-10-05 00:23yes2433 s
ComparativeGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-05 01:46yes2344 s
ComparativeMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-04 23:50yes2532 s
ComparativeGPT-6 Lunagpt-6-luna2026-10-05 01:19yes542 s
ComparativeMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-05 00:34yes2131 s
Budget constrainedClaude Haiku 4.5claude-haiku-4-5-202510012026-10-04 22:31yes169 s
Budget constrainedGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-04 23:58yes27 s
Budget constrainedGemini 3.5 Flashgemini-3.5-flash2026-10-05 01:52yes1524 s
Budget constrainedPerplexity Sonarsonar2026-10-05 00:47yes153 s
Budget constrainedGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-05 00:47yes209 s
Budget constrainedMistral Smallmistral/mistral-small via mistral2026-10-05 01:18yes96 s
Budget constrainedDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-05 00:51yes2540 s
Budget constrainedLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-05 01:09yes63 s
Budget constrainedQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-05 01:24no028 s
Budget constrainedKimi K2moonshotai/kimi-k2 via novita2026-10-05 01:51yes1826 s
Budget constrainedGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-05 00:44yes2326 s
Budget constrainedMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-04 23:51yes920 s
Budget constrainedGPT-6 Lunagpt-6-luna2026-10-04 22:52yes213 s
Budget constrainedMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-04 22:36yes1419 s
Scale constrainedClaude Haiku 4.5claude-haiku-4-5-202510012026-10-05 00:33no07 s
Scale constrainedGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-05 01:47yes36 s
Scale constrainedGemini 3.5 Flashgemini-3.5-flash2026-10-04 22:23yes1532 s
Scale constrainedPerplexity Sonarsonar2026-10-05 00:46yes174 s
Scale constrainedGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-04 23:04yes148 s
Scale constrainedMistral Smallmistral/mistral-small via mistral2026-10-05 01:15no07 s
Scale constrainedDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-04 23:28yes2238 s
Scale constrainedLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-04 23:25yes53 s
Scale constrainedQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-05 01:39no028 s
Scale constrainedKimi K2moonshotai/kimi-k2 via novita2026-10-04 22:09yes1422 s
Scale constrainedGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-05 01:25yes1520 s
Scale constrainedMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-04 22:11yes512 s
Scale constrainedGPT-6 Lunagpt-6-luna2026-10-04 23:47yes324 s
Scale constrainedMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-04 23:52no02 s
Negative framingClaude Haiku 4.5claude-haiku-4-5-202510012026-10-05 01:26yes178 s
Negative framingGPT-5.4 minigpt-5.4-mini-2026-03-172026-10-05 00:44yes45 s
Negative framingGemini 3.5 Flashgemini-3.5-flash2026-10-05 01:48yes1627 s
Negative framingPerplexity Sonarsonar2026-10-05 00:35yes183 s
Negative framingGrok 4.1 Fastspacexai/grok-4.1-fast-non-reasoning via vertex2026-10-05 01:48yes217 s
Negative framingMistral Smallmistral/mistral-small via mistral2026-10-04 23:54yes55 s
Negative framingDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-10-05 01:10yes2546 s
Negative framingLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-10-04 23:19yes52 s
Negative framingQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-10-05 00:45yes2429 s
Negative framingKimi K2moonshotai/kimi-k2 via novita2026-10-05 00:05yes2325 s
Negative framingGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-10-04 23:34yes2435 s
Negative framingMiniMax M2.5minimax/minimax-m2.5 via minimax2026-10-05 00:20yes916 s
Negative framingGPT-6 Lunagpt-6-luna2026-10-04 22:50yes315 s
Negative framingMuse Glimmer 30Bmeta/muse-glimmer-30b via togetherai2026-10-05 01:15yes2132 s

Normalization in this category

Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.

ShowHide
Category-scoped readings
SafeStack read as SafeStack Academy
Unresolved, counted raw
BSG Secure Development Lifecycle Training
Code Nation
Codenomicon
Coding Dojo
Company-specific programs
Contrast Secure Code Learning Hub
Cybrary for Teams
G2-listed platform(s)
GitHub Secure Code Game
GitHub Security Lab
HackTheBox
HackerOne Security Knowledge Platform
OWASP SKF/Juice Shop
OWASP Secure Coding Academy / Offensive360
OWASP Secure Coding Practices
OWASP Security Knowledge Framework (SKF)
OWASP Security Shepherd
OWASP WebGoat
OWASP's own site
Offensive Security (OSCP)
OpenSSF "Developing Secure Software" (LFD121)
OpenSSF (Linux Foundation)
OpenSSF / Linux Foundation Education free courses
OpenSSF Linux Foundation Education
SAFECode
SANS Cyber Aces
SANS Institute – Developer Security Training
SANS SEC540: Cloud Security and DevSecOps Automation
SecureCodeWarrior
SecureFlag - OWASP
SecureFlag Training
SecureFlag’s Small Business Training plan
Security Innovation Application Security Training
Snyk Training
SourceForge-listed tools
The "Developing Secure Software" course from the Linux Foundation
The Linux Foundation - LFD121
edX
secure-codes.com
Discontinued, still offered
No shut-down product was recommended here.

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