What they want:

We publish exceptional horror fiction, from the macabre to the supernatural to the thoroughly terrifying. Topics may include but are not limited to vampirism, lycanthropy, demonic possession, witchcraft, hauntings and apparitions of all sorts. While we prefer novels, we will consider collections of high-quality horror short stories. We are currently especially interested in well-written, truly frightening horror fiction with unusual settings, such as monasteries, museums and the like.

Length: Up to 78,000 words
Submission Guidelines: http://www.8thcrowbooks.com/content/submit.php

What they want:

All our books are “genre” fiction in one way or another — specifically fantasy, science fiction, horror, and that new catch-all urban or modern fantasy. Those are quite wide-ranging in themselves; we’re looking for all types of sub-genre, so for example, hard SF, space opera, cyberpunk, military SF, alternate future history, future crime, time travel, and more. We have no problem if your book mashes together two or more of these genres; in fact, we practically insist upon it.

Notes:  Will only accept unsolicited submissions during “open door” period.  Otherwise, you must have an agent.
Submission Guidelines: http://angryrobotbooks.com/submissions/

What they want:

We’re open minded so long as the book examines the darker side of life! We can publish art books, comics (collected, stand-alone, or series), novels and short stories – all we ask is that your submission is complete and at a level of professionalism that equals the work currently published.

…The goal of Asylum Ink Magazine is to build greater awareness and traffic between the various contributors as well as create an easily digestible anthology for fans.  If you are interested in participating, all contributions will be credited to their respective creators, a free ad and links will be provided to your home pages.

The compendium features the finest in horror, sci-fi, and dark art around.

Deadline: by the 10th of the month
Length: negotiable
Payment: exposure
Submission Guidelines: http://asylumink.net/submissions.html

What they want:

Belladonna Publishing is a new independent press. We publish speculative novels, anthologies, graphic novels and comics. Our preferred genres are: dark fantasy, urban fantasy, gothic, steampunk and fairytales.

Length: 50,000-80,000 words
Submission Guidelines:  http://belladonnapublishing.com/submissions/novels/

What they want:

We are publishers of dark fiction. This includes science fiction, horror, thrillers, erotic horror, suspense, and other uncategorized works. We are not fond of limitations so explore your darkest side. For more info on what we want, please visit this section of our forum.

Length: 10,000-80,000 words
Payment: 40% net royalties
Submission Guidelines: http://bloodboundbooks.net/bloodboundbooks/?page_id=26

What they want:

Bold Strokes Books offers a diverse collection of LesbianGayBiTransQueer general and genre fiction. BSB genre fiction includes all romance sub-genres as well as action, adventure, crime, mystery/intrigue, and speculative fic (sci-fi/fantasy/horror).

Length: 55,000-130,000 words
Submission Guidelines: http://www.boldstrokesbooks.com/pages.php?pageid=15 

What they want:

As our name implies, we like dark stories across all the genres we offer. If someone’s ever told you a story is too dark, we’d love to see it.

Length: 20,000-140,000 words
Payment: 40% eBook royalties, 25% net revenue print
Submission Guidelines: http://www.damnationbooks.com/submissions.php

What they want:

DarkFuse is now accepting submissions for original dark fiction novels. We’re looking for a wide array of original modern dark fiction novels in the fields of horror, thrillers and the bizarre. We only publish original novels, NO reprints or self-published.

Length: 50,000-80,000 words
Payment: Flat payment for limited edition hardcover rights, plus 50% profit sharing revenue for paperback & e-book sales.
Submission Guidelines: http://darkfuse.submittable.com/submit

What they want:

Manuscripts set in dystopian, sci-fi, horror, paranormal, apocalyptic, post-apocalyptic, steampunk, or fantasy worlds. Novels can have a wide range of romance in them or none at all. We will consider anything from aliens to zombies. We are fascinated to see Young Adult with male co-leads. We accept LGBT and would like to see manuscripts in which the characters live in a diverse world (unless it’s part of the story line that everyone be the same).

Length: 65,000-150,000 words
Submission Guidelines: http://www.evilgirlfriendmedia.com/

What they want:

We accept fiction submissions. We currently have 8 separate lines of books to choose from.
Dreamers- Fantasy Submissions. Witches, Wizards, Kings, Queens, Kingdoms… Think Lord of the Rings type stuff, and Harry Potter.
Bitten- Paranormal Submissions: Werewolves, Sirens, Vampires… Grimms Fairy Tale…
Fire- Our Erotica Submissions go here. Any and all heat levels.
Below- Our Horror Line of books.
Zone- Science Fiction: Aliens, planets… Think Avatar, or Star Trek…
Romance: Blush- Romantic Comedy Loveswept-Sweet Romance

Submission Guidelines: http://fireflyandwispbooks.com/submissions.html

What they want:

Fourth Horseman Press typically considers novels, novellas, short story collections, graphic novels, and other innovative book-length works for publication. We do not publish poetry, children’s books, or memoirs. Interested authors should familiarize themselves with our catalogue and be aware that we are a small, independent press with limited resources. Though compensation for our authors is often basic, each of our books boasts superior design and promotion. Truly, every one of our publications is a labor of love.

Submission Guidelines: http://www.fourthhorsemanpress.com/Contact.htm

What they want:

Gollancz is the oldest specialist SF & Fantasy publisher in the UK. Founded in 1927 and with a continuous SF publishing programme dating back to 1961, we are home to a galaxy of award-winning and bestselling authors. Through our long-running SF and Fantasy Masterworks programme, and major digital initiative the SF Gateway, we have one of the largest ranges of SF and Fantasy of any publisher in the world.

Gollancz publish Science Fiction, Fantasy, Horror, Urban Fantasy, Steampunk, Dystopia and a little YA cross-over fiction. If you’re writing in these areas, we’re happy to take a look at your work.

Length: 80,000+ words
Submission Guidelines: http://www.gollancz.co.uk/2012/09/friday-reads-our-submission-guidelines/

What they want:

Graveside Tales seeks chilling, character-driven stories of the Supernatural, particularly those set in the Lycanthrope universe. Psychological suspense, “killers on the loose,” and cross-genre blends (Paranormal Romance or dark fiction containing SciFi, Historical and/or Fantasy elements) are welcome provided the subject matter is original and the focus remains on horror. Gore, sex, or controversial content is okay as long as its inclusion is essential to the story and not incorporated solely for shock value.

Length: 20,000-100,000 words (see website for specifics)
Submission Guidelines: http://gravesidetales.com/index.php/guidelines

What they want:

We specialize in the publication and distribution of writings pertaining to the Pagan and Occult Communities. Submissions of fiction and non-fiction are also welcome.

We do not currently state horror as a genre on the website but we do accept horror submissions as several of our publications are of the “Horror” genre.

Payment: 20% Royalties (click here for details)
Submission Guidelines: http://www.graveyardpublishing.com/id2.html

What they want:

Established in 2007, Iron Cauldron Books is a small press striving to bring you the best alternative and specialty reads from fresh voices. Like a gourmet restaurant for books, our focus is on quality, not quantity. With selections ranging from cookbooks to zines, we have earned a reputation for our discriminating taste in horror, paranormal, new age, witchcraft, and spiritual non-fiction.

Length: 25,000-75,000 words
Payment: Royalties
Submission Guidelines: http://www.ironcauldronbooks.com/